苏北盆地张家垛油田阜三段油气富集规律

doi:10.11743/ogg20120202

摘要/Abstract

摘要：

苏北盆地张家垛油田阜宁组三段具有良好的油气勘探潜力,是今后中国石化华东分公司增储上产的一个重要领域。但由于该储层非均质性强,油气富集规律不清楚,严重制约了下一步的勘探开发。通过对烃源岩、储层、圈闭等成藏基本地质条件的研究,利用泥岩压实规律进行异常压力分析。研究结果表明:①阜宁组异常高压为欠压实成因,与干酪根生烃无关,深层优质储层与欠压实密切相关,异常压力高值区是优质储层分布区;②异常压力高值分布在阜三顶-阜四段,高异常压力形成区域性封闭层,油气主要富集于高异常压力之下的低势区;③高异常压力最有利于阜三段油气成藏,而低异常压力区有可能在阜三段的上覆地层戴南组成藏。最终利用高压封闭的区域性盖层和沉积微相研究,认为阜三段向南成藏条件会变好,是下一步勘探的目标区。

关键词: 异常压力, 欠压实, 储层, 阜三段, 张家垛油田, 苏北盆地

Abstract:

The 3^rd member of Funing Formation has a great potential for oil and gas exploration and will be one of the most important targets for reserve growth and production addition of SINOPEC Huadong Oilfield Company.However,the reservoir heterogeneity is strong and hydrocarbon enrichment patterns are poorly understood,seriously constraining future exploration and development.Based on study of the basic geologic conditions for source rocks,reservoirs,and traps,abnormal pressure is analyzed according to the rules of mudstones compaction.The abnormal pressures of Funing Formation are caused by ofundercompaction,instead of hydrocarbon generation of kerogen.The deep high-quality reservoirs are closely related with undercompaction and the high-quality reservoirs occur in areas where the abnormal pressure is high.The high abnormal pressure occurs in interval from the top 3^rd member to 4^th member of Funning Formation and forms a regional seal.Hydrocarbons mainly accumulate in low potential areas below this seal.High abnormal pressure favors hydrocarbon accumulation in the 3^rd member of Funning Formation,while low abnormal pressure may be favorable for hydrocarbon accumulation in the overlying Dainan Formation.Based on study of the regional high abnormal pressure seal and sedimentary microfa-cies,it is believed that the hydrocarbon accumulation conditions of the 3^rd member of Funning Formation are better to the south,thus the 3^rd member to the south is a favorable target for future exploration.

Key words: abnormal pressure, undercompaction, reservoir, the 3^rd member of Funing Formation, Zhangjiaduo oilfield, Subei Basin

中图分类号:

TE122.3

焦里力. 苏北盆地张家垛油田阜三段油气富集规律[J]. 石油与天然气地质, 2012, 33(2): 166-172. doi: 10.11743/ogg20120202 Jiao Lili. Hydrocarbon enrichment patterns of the 3^rd member of Funing Formation in Zhangjiaduo oilfield, Subei Basin[J]. Oil & Gas Geology, 2012, 33(2): 166-172. doi: 10.11743/ogg20120202

参考文献

[1] Mark W,Stephen O,Bitrus P,et al.Overpressure in the Taranaki Basin:distribution,causes,and implications for exploration[J].AAPG Bulletin,2009,95(1):339-370.
[2] Agus M R,Neil R G.Overpressure and mudrock compaction in the Lower Kutai Basin,Indonesia:a radical reappraisal[J].AAPG Bulletin,2011,95(10):1725-1744.
[3] 郝芳,邹华耀,倪建华,等.沉积盆地超压系统演化与深层油气成藏条件[J].地球科学——中国地质大学学报,2002,27(5):610-615. Hao Fang,Zou Huayao,Ni Jianhua,et al.Evolution of overpressured systems in sedimentary basins and conditions for deep oil/gas accumulation[J].Earth Science—Journal of China University of Geosciences,2002,27(5):610-615.
[4] 张哨楠.致密天然气砂岩储层:成因和讨论[J].石油与天然气地质,2008,29(1):1-10. Zhang Shaonan.Tight sandstone gas reservoirs:their origin and discussion[J].Oil & Gas Geology,2008,29(1):1-10.
[5] 窦伟坦,田景春,王峰,等.鄂尔多斯盆地长6油层组储集砂岩成岩作用及其对储层性质的影响[J].成都理工大学学报(自然科学版),2009,36(2):153-158. Dou Weitan,Tian Jingchun,Wang Feng,et al.Diagenesis and its influence on the reservoir quality of Member 6 of the Upper Triassic Yanchang Formation oil reservoirs in Ordos Basin,China[J].Journal of Chengdu University of Technology(Science & Technology Edition),2009,36(2):153-158.
[6] 丁晓琪,张哨楠,周文,等.鄂尔多斯盆地北部上古生界致密砂岩储层特征及其成因探讨[J].石油与天然气地质,2007,28(4):491-496. Ding Xiaoqi,Zhang Shaonan,Zhou Wen,et al.Characteristics and genesis of the Upper Paleozoic tight sandstone reservoirs in the northern Ordos basin[J].Oil & Gas Geology,2007,28(4):491-496.
[7] Colton B V.Role of pressure in smectite dehydration—effects on geopressure and smectite-illite transformation[J].AAPG Bulletin,1987,71:1414-1427.
[8] 周荔青,刘池洋,陆黄生,等.苏北盆地阜三段油气成藏规律[J].石油实验地质,2004,26(2):187-193. Zhou Liqing,Liu Chiyang,Lu Huangsheng,et al.Pool-forming rules of oil and gas in the third member of the Funing Formation,the North Jiangsu Basin[J].Petroleum Geology & Expeximent,2004,26(2):187-193.
[9] 吴永平,王允诚,李仲东,等.镇泾地区地层异常压力与油气运聚关系[J].西南石油大学学报(自然科学版),2008,30(1):47-50. Wu Yongping,Wang Yuncheng,Li Zhongdong,et al.The relation between abnormal pressure and oil migration in Zhenjing region[J].Journal of Southwest Petroleum University(Science & Technology Edition),2008,30(1):47-50.
[10] 李仲东,张哨楠,李良,等.鄂尔多斯盆地上古生界压力演化及成藏过程分析[J].中国科技论文在线,2008,3(11):841-848. Li Zhongdong,Zhang Shaonan,Li Liang,et al.Reservoir-processing analysis and the development of pressure in Upper Paleozoic of Ordos Basin[J].Sciencepaper Online,2008,3(11):841-848.
[11] 郑丹,徐思煌,尚小亮.珠江口盆地惠州凹陷泥岩压实特征及其成因[J].地球科学与环境学报,2010,32(4):372-377. Zheng Dan,Xu Sihuang,Shang Xiaoliang.Characteristics and genesis of mudstone compaction in Huizhou Depression,Pearl River Mouth Basin[J].Journal of Earth Sciences and Environment,2010,32(4):372-377.
[12] 丁晓琪,张哨楠,谢世文.鄂尔多斯盆地镇泾地区中生界成藏系统[J].石油与天然气地质,2011,32(2):157-164. Ding Xiaoqi,Zhang Shaonan,Xie Shiwen,et al.Hydrocarbon accumulation system of the Mesozoic in Zhenjing oilfield,the Ordos Basin[J].Oil & Gas Geology,2011,32(2):157-164.
[13] 徐东锋,赵红佳,刘见宝.济阳坳陷沾化凹陷异常高压与油气成藏模式[J].石油与天然气地质,2011,32(4):601-605. Xu Dongfeng,Zhao Hongjia,Liu Jianbao.Abnormal pressure and hydrocarbon reservoiring pattern of the Zhanhua sag in Jiyang Depression[J].Oil & Gas Geology,2011,32(4):601-605.
[14] 罗晓容,陈荷立,王家华,等.江汉盆地地层埋藏史研究[J].石油实验地质,1989,11(4):369-378. Luo Xiaorong,Chen Heli,Wang Jiahua,et al.Study on burial history of the strata in Jianghan Basin[J].Petroleum Geology & Expeximent,1989,11(4):369-378.
[15] Richard E,Swarbrick M J.Abnormal pressrure in hydrocarbon environments[J].AAPG Bulletin,1986,70(1):13-34.
[16] Osborne M J,Swarbrick R E.Mechanisms for generating overpressure in sedimentary basins:a reevaluation[J].AAPG Bulletin,1997,81:1023-1041.
[17] Magnus W A.Quantitative comparison of some mechanisms generating overpressure in sedimentary basins[J].Tectonophysics,2001,334(3):211-235.
[18] Holm G.How abnormal pressure affect hydrocarbon exploration,exploitation[J].Oil & Gas Journal,1998,96(2):79-84.
[19] Sayers C M,Johnson G M,Denyer G.Predrill pore-pressure prediction using 4-C seismic data[J].Geophysics,2002,67:1286-1292.
[20] 杜栩,郑洪印,焦秀琼.异常压力与油气分布[J].地学前缘,1995,2(3-4):137-146. Du Xu,Zheng Hongyin,Jiao Xiuqiong.Abnormal pressure and hydrocarbon accumulation[J].Earth Science Frontiers,1995,2(3-4):137-146.
[21] Guo Xiaowen,Sheng He,Liu Keyu,et al.Oil generation as the dominant overpressure mechanism in the Cenozoic Dongying depression,Bohai Bay Basin,China[J].AAPG Bulletin,2010,94(12):1859-1881.
[22] Hunt J M,Whelan J K.Gas generation—a major cause of deep Gulf Coast overpressures[J].Oil & Gas Journal,1994,92:59-62.
[23] 郝芳,董伟良.沉积盆地超压系统演化、流体流动与成藏机理[J].地球科学进展,2001,16(1):79-85. Hao Fang,Dong Weiliang.Evolution,fluid flow and petroleum accumulation in overpressured systems in sedimentray basins[J].Advance in Earth Sciences,2001,16(1):79-85.
[24] Mark R P T,Richard R H,Richard E S,et al.Origin of overpressure and pore-pressure prediction in the Baram province,Brunei[J].AAPG Bulletin,2009,93(1):51-74.