Search results for: D. Hovorka

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article

Assessment of Low Probability Material Impacts

Susan D. Hovorka

Energy Procedia > 2017 > 114 > C > 5311-5315

The conceptualization of activities needed to execute effective and publically acceptable geologic storage have advanced greatly in the past decade, but a few gaps in the conceptual framework remain. To close one gap, three key elements — risk assessment, modeling and monitoring — are linked via a process described here as “Assessment of Low Probability Material Impacts” (ALPMI). The purpose of this...

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Optimization Study of Seismic Monitoring Network at the CO2 Injection Site – Lessons Learnt from Monitoring Experiment at the Cranfield Site, Mississippi, U.S.A.

Makiko Takagishi, Tsutomu Hashimoto, Tetsuma Toshioka, Shigeo Horikawa, more

Energy Procedia > 2017 > 114 > C > 4028-4039

In this paper, we discuss the design (seismometers’ types and layout) of seismic monitoring network that monitors microseismic events induced by CO₂ injection and natural earthquakes that occurs around the CO₂ injection site. We also elucidate CO₂ injection and occurrences of microseismic events. Firstly, we tested a monitoring network at the Large-scale CO₂ injection site in the U.S.A to obtain lessons...

article

Monitoring after Closure: A Case of the Horse Already Out of the Barn

Susan D. Hovorka

Energy Procedia > 2017 > 114 > C > 3754-3756

In the past decade, a prolonged period of monitoring after the end of injection has become one of the expected phases of a CO₂ storage project among regulators and stakeholders, especially in the US. However, several serious problems with developing this so called Post Injection Site Care (PISC) plan have not been addressed. It remains unclear how prolonged monitoring can be used to improve project...

article

Model-based Assessment of the Site-specific Cost of Monitoring

Behnaz Bolhassani, Susan D. Hovorka, Seyyed A. Hosseini, Michael H. Young, more

Energy Procedia > 2017 > 114 > C > 5316-5319

Several studies have developed costs of monitoring; however the costs are typically applied to generic sites and use a set of pre-selected monitoring approaches. In this study we use analytical models of leakage cases to assess the cost of leakage detection for sites with specified properties and assess the value of different monitoring approaches. We assume that leakage occurs at former production...

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Gas source attribution techniques for assessing leakage at geologic CO2 storage sites: Evaluating a CO2 and CH4 soil gas anomaly at the Cranfield CO2-EOR site

Jacob S. Anderson, Katherine D. Romanak, Changbing Yang, Jiemin Lu, more

Chemical Geology > 2017 > 454 > C > 93-104

At the Cranfield CO₂ enhanced oil recovery (CO₂-EOR) site, a localized area of high concentrations of CO₂ (up to 44%) and CH₄ (up to 47%) in soil gas was detected near a plugged and abandoned well. The complexity of attributing this anomaly, especially in a CO₂-EOR setting, underscores the need for careful attribution techniques and provides rare and valuable experiential knowledge on attributing...

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Soil gas dynamics monitoring at a CO₂-EOR site for leakage detection

Changbing Yang, Katherine D. Romanak, Robert C. Reedy, Susan D. Hovorka, more

Geomechanics and Geophysics for Geo-Energy and Geo-Resources > 2017 > 3 > 3 > 351-364

A comprehensive soil gas monitoring program was conducted at a CO₂-enhanced oil recovery site in western Mississippi to validate near-surface monitoring technologies for CO₂ leakage detection. The program included three main monitoring technologies: (1) using commercial sensors for real-time in situ monitoring of atmospheric and soil CO₂ concentrations and of environmental parameters; (2) intermittent...

article

Tracer test to constrain CO₂ residual trapping and plume evolution

Mehdi Zeidouni, Susan D. Hovorka, Kewei Shi

Environmental Earth Sciences > 2016 > 75 > 22 > 1-13

CO₂ residual trapping, post-injection plume extent, and time for plume stabilization for CO₂ geological storage highly depend on the hysteresis process which is the discrepancy between drainage and imbibition processes. CO₂ flow in the injection zone during the injection period is mainly controlled by the drainage process during which the non-wetting CO₂-rich phase replaces the wetting aqueous phase...

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Using pulse testing for leakage detection in carbon storage reservoirs: A field demonstration

Alexander Y. Sun, Jiemin Lu, Barry M. Freifeld, Susan D. Hovorka, more

International Journal of Greenhouse Gas Control > 2016 > 46 > C > 215-227

Monitoring techniques capable of deep subsurface detection are desirable for early warning and leakage pathway identification in geologic carbon storage formations. This work demonstrates the feasibility of a pulse-testing-based leakage detection procedure, in which the storage reservoir is stimulated using periodic injection patterns and the acquired pressure perturbation signals are analyzed in...

article

GPS-based monitoring of surface deformation associated with CO2 injection at an enhanced oil recovery site

Makan A. Karegar, Timothy H. Dixon, Rocco Malservisi, Qian Yang, more

International Journal of Greenhouse Gas Control > 2015 > 41 > C > 116-126

High precision GPS measurements have been used to measure surface deformation associated with CO₂ injection at an enhanced oil recovery (EOR) field in South Texas. We describe a filtering procedure to reduce noise associated with seasonal hydrologic effects, achieving post-filter precisions of better than 2mm and 3mm in horizontal and vertical components respectively. A model assuming uniform pressurization...

article

The state of the art in monitoring and verification—Ten years on

Charles Jenkins, Andy Chadwick, Susan D. Hovorka

International Journal of Greenhouse Gas Control > 2015 > 40 > C > 312-349

In the ten years since publication of the IPCC Special Report on CCS, there has been considerable progress in monitoring and verification (M&V). Numerous injection projects, ranging from small injection pilots to much larger longer-term commercial operations, have been successfully monitored to the satisfaction of regulatory agencies, and technologies have been adapted and implemented to demonstrate...

article

Monitoring above-zone temperature variations associated with CO₂ and brine leakage from a storage aquifer

Mehdi Zeidouni, Jean-Philippe Nicot, Susan D. Hovorka

Environmental Earth Sciences > 2014 > 72 > 5 > 1733-1747

CO₂ injection in saline aquifers induces temperature changes owing to processes such as Joule–Thomson cooling, endothermic water vaporization, exothermic CO₂ dissolution besides the temperature discrepancy between injected and native fluids. CO₂ leaking from the injection zone, in addition to initial temperature contrast due to the geothermal gradient, undergoes similar processes, causing temperature...

article

Can We Treat CO2 Well Blowouts like Routine Plumbing Problems? A Study of the Incidence, Impact, and Perception of Loss of Well Control

Sean L. Porse, Sarah Wade, Susan D. Hovorka

Energy Procedia > 2014 > 63 > C > 7149-7161

Risk communication literature suggests that for a number of reasons, the public may perceive a risk to be greater than indicated by its statistical probability. Public concern over risk can lead to significant and costly delays in project permitting and operations. Considering these theories, media coverage of CO₂-related well blowouts in 2013 gave rise to the questions: What is the risk of CO₂ well...

article

Microseismic Monitoring at the Large-scale CO2 Injection Site, Cranfield, MS, U.S.A.

Makiko Takagishi, Tsutomu Hashimoto, Shigeo Horikawa, Kinichiro Kusunose, more

Energy Procedia > 2014 > 63 > C > 4411-4417

This paper describes passive seismic monitoring at the large-scale CO₂ injection site, Cranfield oilfield, Mississippi, U.S.A. We constructed a horizontal near-surface monitoring network and have been monitoring for more than two years to elucidate relationship between large-volume CO₂ injection and occurrences of induced seismicities. We have detected no microseismic events that occurred in and around...

article

Greensites and brownsites: Implications for CO2 sequestration characterization, risk assessment, and monitoring

Brad D. Wolaver, Susan D. Hovorka, Rebecca C. Smyth

International Journal of Greenhouse Gas Control > 2013 > 19 > Complete > 49-62

Proposed CO ₂ sequestration storage sites will require different approaches in characterization, risk assessment, and monitoring, given prior site history and land use. Those sites lacking previous subsurface development are defined as greensites, whereas sites where the subsurface is developed, particularly for hydrocarbon production, are defined as brownsites. Greensite CO ₂ injection...

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Midproject assessment of the SECARB Early Test at Cranfield, Mississippi

Jean-Philippe Nicot, Susan D. Hovorka, Timothy A. Meckel

International Journal of Greenhouse Gas Control > 2013 > 18 > Complete > 343-344

article

Monitoring a large-volume injection at Cranfield, Mississippi—Project design and recommendations

Susan D. Hovorka, Timothy A. Meckel, Ramón H. Treviño, S.D. Hovorka, more

International Journal of Greenhouse Gas Control > 2013 > 18 > Complete > 345-360

Injection and storage of 4 million metric tons of CO ₂ have been monitored to observe multiphase fluid flow, to test technologies, to document permanence of storage, and to advance techniques for capacity estimation. The injection interval is the 3000-m-deep fluvial Tuscaloosa Formation at a structural closure that defines the Cranfield oilfield. Tests were conducted in the oil-producing area...

article

Single-well push–pull test for assessing potential impacts of CO2 leakage on groundwater quality in a shallow Gulf Coast aquifer in Cranfield, Mississippi

Changbing Yang, Patrick J. Mickler, Robert Reedy, Bridget R. Scanlon, more

International Journal of Greenhouse Gas Control > 2013 > 18 > Complete > 375-387

Understanding potential impacts of CO ₂ leakage on groundwater quality in shallow aquifers is a critical concern for geologic sequestration. This study presents a single-well push–pull test conducted in the Cranfield shallow aquifer, the SECARB Phase III early test site, for assessing potential impacts of CO ₂ leakage on groundwater quality. Groundwater pH, alkalinity, and electric...

article

CO2 recycling accounting and EOR operation scheduling to assist in storage capacity assessment at a U.S. gulf coast depleted reservoir

Jong-Won Choi, Jean-Philippe Nicot, Seyyed A. Hosseini, Sigrid J. Clift, more

International Journal of Greenhouse Gas Control > 2013 > 18 > Complete > 474-484

From the start of CO ₂ injection on July 2008, through August 31, 2011, ∼3 million metric tons of CO ₂ have been stored in the lower Tuscaloosa Formation at Cranfield, Mississippi. We used the field to illustrate the importance of two operational choices on CO ₂ storage capacity: (1) reinjection of CH ₄ with the recycled CO ₂ ; and (2) injection rate in the...

article

Static and dynamic reservoir modeling for geological CO2 sequestration at Cranfield, Mississippi, U.S.A.

Seyyed Abolfazl Hosseini, Hamidreza Lashgari, Jong W. Choi, Jean-Philippe Nicot, more

International Journal of Greenhouse Gas Control > 2013 > 18 > Complete > 449-462

Reservoir modeling is an important process for improving our understanding of processes during and after CO ₂ injection, and traditional rock and fluid characterization is the first step in building a static reservoir model. This model can be further refined by integrating dynamic data as they become available during the life of the project. Such data could improve the static model such that...

article

Constraining CO2 simulations by coupled modeling and inversion of electrical resistance and gas composition data

Joseph Doetsch, Michael B. Kowalsky, Christine Doughty, Stefan Finsterle, more

International Journal of Greenhouse Gas Control > 2013 > 18 > Complete > 510-522

This study investigates how model predictions of subsurface CO ₂ migration can be constrained and improved with time-lapse electrical resistance tomography (ERT) data for a pilot experiment located at Cranfield, Mississippi. To this end, we first invert the time-lapse ERT dataset using structurally constrained and unconstrained inversions. With the ERT time-lapse inversions, we image the increasing...

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Search results for: D. Hovorka

Assessment of Low Probability Material Impacts

Optimization Study of Seismic Monitoring Network at the CO2 Injection Site – Lessons Learnt from Monitoring Experiment at the Cranfield Site, Mississippi, U.S.A.

Monitoring after Closure: A Case of the Horse Already Out of the Barn

Model-based Assessment of the Site-specific Cost of Monitoring

Gas source attribution techniques for assessing leakage at geologic CO2 storage sites: Evaluating a CO2 and CH4 soil gas anomaly at the Cranfield CO2-EOR site

Soil gas dynamics monitoring at a CO₂-EOR site for leakage detection

Tracer test to constrain CO₂ residual trapping and plume evolution

Using pulse testing for leakage detection in carbon storage reservoirs: A field demonstration

GPS-based monitoring of surface deformation associated with CO2 injection at an enhanced oil recovery site

The state of the art in monitoring and verification—Ten years on

Monitoring above-zone temperature variations associated with CO₂ and brine leakage from a storage aquifer

Can We Treat CO2 Well Blowouts like Routine Plumbing Problems? A Study of the Incidence, Impact, and Perception of Loss of Well Control

Microseismic Monitoring at the Large-scale CO2 Injection Site, Cranfield, MS, U.S.A.

Greensites and brownsites: Implications for CO2 sequestration characterization, risk assessment, and monitoring

Midproject assessment of the SECARB Early Test at Cranfield, Mississippi

Monitoring a large-volume injection at Cranfield, Mississippi—Project design and recommendations

Single-well push–pull test for assessing potential impacts of CO2 leakage on groundwater quality in a shallow Gulf Coast aquifer in Cranfield, Mississippi

CO2 recycling accounting and EOR operation scheduling to assist in storage capacity assessment at a U.S. gulf coast depleted reservoir

Static and dynamic reservoir modeling for geological CO2 sequestration at Cranfield, Mississippi, U.S.A.

Constraining CO2 simulations by coupled modeling and inversion of electrical resistance and gas composition data

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