Models for dynamic evaluation of mudstone/shale cap rocks and their applications in the Lower Paleozoic sequences, Sichuan Basin, SW China
Identifieur interne : 000127 ( Main/Exploration ); précédent : 000126; suivant : 000128Models for dynamic evaluation of mudstone/shale cap rocks and their applications in the Lower Paleozoic sequences, Sichuan Basin, SW China
Auteurs : ZHIJUN JIN [République populaire de Chine] ; YUSONG YUAN [République populaire de Chine] ; DONGSHENG SUN [République populaire de Chine] ; QUANYOU LIU [République populaire de Chine] ; SHUANJIAN LI [République populaire de Chine]Source :
- Marine and petroleum geology [ 0264-8172 ] ; 2014.
Descripteurs français
- Pascal (Inist)
English descriptors
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Abstract
The estimation of the sealing capability of cap rocks dynamically is one of the fundamental geological problems that must be resolved in petroleum exploration. In this paper, a porosity-capillary pressure (φ -Pc) method was used to estimate the sealing capacity during cap rock burial and a permeability-capillary pressure (K-Pc) plus over-consolidation ratio (OCR) method to estimate the sealing capacity during uplift. Based on 120 capillary pressure-porosity measurements, a φ-Pc mathematical model has been established for the burial phase. By analyzing the permeability data measured from 12 mudstone/ shale samples from different stratigraphic intervals under step loading conditions, a permeability -confining pressure (K-P) mathematical model has been constructed. Moreover, capillary pressure -permeability data measured from 141 mudstone or shale cap rocks have been used to establish a K-Pc mathematical model for seal capacity evaluation during uplift. Additionally, the OCR of mudstone or shale was calculated from the results of reconstructed burial and uplift histories. These mathematical models were used in case studies in the Sichuan Basin, South China. The results indicate that capillary pressure (Pc) is inadequate in evaluating sealing capacity of cap rocks but the combination of parameters Pc and OCR works well. The agreement between calculated and measured values shows the effectiveness and reliability of the models for dynamic estimation of the sealing capacity of mudstone/shale cap rocks established in this study.
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aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Yusong Yuan" sort="Yusong Yuan" uniqKey="Yusong Yuan" last="Yusong Yuan">YUSONG YUAN</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Sinopec Petroleum Exploration and Production Research Institute, 31 Xueyuan Road</s1><s2>Beijing 100083</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Dongsheng Sun" sort="Dongsheng Sun" uniqKey="Dongsheng Sun" last="Dongsheng Sun">DONGSHENG SUN</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Sinopec Petroleum Exploration and Production Research Institute, 31 Xueyuan Road</s1><s2>Beijing 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Xueyuan Road</s1><s2>Beijing 100083</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Marine and petroleum geology</title><title level="j" type="abbreviated">Mar. pet. geol.</title><idno type="ISSN">0264-8172</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Marine and petroleum geology</title><title level="j" type="abbreviated">Mar. pet. geol.</title><idno type="ISSN">0264-8172</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Sichuan Basin</term><term>Sichuan China</term><term>burial</term><term>cap rocks</term><term>capillary pressure</term><term>case studies</term><term>confining pressure</term><term>consolidation</term><term>lower Paleozoic</term><term>mathematical models</term><term>mudstone</term><term>permeability</term><term>petroleum exploration</term><term>porosity</term><term>sealing</term><term>shale</term><term>uplifts</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Modèle mathématique</term><term>Mudstone</term><term>Shale</term><term>Cap rock</term><term>Paléozoïque inf</term><term>Etanchement</term><term>Prospection pétrolière</term><term>Porosité</term><term>Pression capillaire</term><term>Enfouissement</term><term>Perméabilité</term><term>Consolidation</term><term>Surrection</term><term>Pression confinement</term><term>Etude cas</term><term>Bassin Sichuan</term><term>Sichuan</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The estimation of the sealing capability of cap rocks dynamically is one of the fundamental geological problems that must be resolved in petroleum exploration. In this paper, a porosity-capillary pressure (φ -P<sub>c</sub>) method was used to estimate the sealing capacity during cap rock burial and a permeability-capillary pressure (K-P<sub>c</sub>) plus over-consolidation ratio (OCR) method to estimate the sealing capacity during uplift. Based on 120 capillary pressure-porosity measurements, a φ-P<sub>c</sub> mathematical model has been established for the burial phase. By analyzing the permeability data measured from 12 mudstone/ shale samples from different stratigraphic intervals under step loading conditions, a permeability -confining pressure (K-P) mathematical model has been constructed. Moreover, capillary pressure -permeability data measured from 141 mudstone or shale cap rocks have been used to establish a K-P<sub>c</sub> mathematical model for seal capacity evaluation during uplift. Additionally, the OCR of mudstone or shale was calculated from the results of reconstructed burial and uplift histories. These mathematical models were used in case studies in the Sichuan Basin, South China. The results indicate that capillary pressure (P<sub>c</sub>) is inadequate in evaluating sealing capacity of cap rocks but the combination of parameters P<sub>c</sub> and OCR works well. The agreement between calculated and measured values shows the effectiveness and reliability of the models for dynamic estimation of the sealing capacity of mudstone/shale cap rocks established in this study.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li></country><settlement><li>Pékin</li></settlement></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Zhijun Jin" sort="Zhijun Jin" uniqKey="Zhijun Jin" last="Zhijun Jin">ZHIJUN JIN</name></noRegion><name sortKey="Dongsheng Sun" sort="Dongsheng Sun" uniqKey="Dongsheng Sun" last="Dongsheng Sun">DONGSHENG SUN</name><name sortKey="Quanyou Liu" sort="Quanyou Liu" uniqKey="Quanyou Liu" last="Quanyou Liu">QUANYOU LIU</name><name sortKey="Shuanjian Li" sort="Shuanjian Li" uniqKey="Shuanjian Li" last="Shuanjian Li">SHUANJIAN LI</name><name sortKey="Yusong Yuan" sort="Yusong Yuan" uniqKey="Yusong Yuan" last="Yusong Yuan">YUSONG YUAN</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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