古地理学报2011，Vol.13Issue(3)：309-316,8.
山东东营车镇凹陷古近系流体异常高压及其对深层碎屑岩储集层的影响
Fluid abnormal overpressure and its influence on deep clastic reservoir of the Paleogene in Chezhen Sag of Dongying, Shandong Province
摘要
Abstract
Sandstone and conglomerate reservoir affected by fluid abnormal overpressure in deep layer is one of the focuses in petroleum exploration and reservoir study. Drilling and oil production test data show that abnormal pressure exists widely in the Paleogene Shahejie Formation, and has closely related with oil-bearing and oil productivity of the sandstone and conglomerate reservoir. In this study, formation pressure in different strata and different zones were calculated with equivalent depth method using logging data calibrated by oil production test data. Calculating results show that formation pressure in the lower Submember of Member 3 of Shahejie Formation (Esx3) is the largest, and its residual formation pressure equals 15-30 MPa. According to the statistics on sandstone and conglomerate's porosity and their residual formation pressure, the porosity increases 2％ when formation pressure increases 5 MPa. Therefore, the sandstone and conglomerate's porosity in Esx3 may be increased by 4％-10％. Integration of microcosmic reservoir characteristics and porosity interpretation of logging data, three factors improving deep sandstone and conglomerate reservoir are listed as follows: ( 1 ) fluid abnormal pressure protects primary and secondary pores formed in early periods, (2) overpressure environment produces acidic groundwater into reservoir and forms dissolution pores, ( 3 ) fluid abnormal overpressure promotes the formation of microfractures, and improves the seepage capacity.关键词
异常高压/(砂)砾岩储集层/深层/古近系/车镇凹陷Key words
abnormal overpressure/ sandstone and conglomerate reservoir/ deep layer/ Paleogene/ Chezhen Sag分类
天文与地球科学引用本文复制引用
鲜本忠,吴采西,佘源琦..山东东营车镇凹陷古近系流体异常高压及其对深层碎屑岩储集层的影响[J].古地理学报,2011,13(3):309-316,8.基金项目
教育部高等学校博士学科点专项科研基金(编号:20090007120001)和国家油气重大专项(编号:2008ZX05014-001-009HZ)联合资助 （编号:20090007120001）
