A Study of Abnormal Pressure Distribution and Formation Mechanism in Qiongdongnan Basin

ZHU  Jian-Jun, ZHANG  Xiao-Bao, ZHANG  Gong-Cheng, LIU  Fang, ZHANG  Ming-Feng, CHEN  Guo-Jun, XIA  Yan-Qing

doi:10.11764/j.issn.1672-1926.2011.02.324

Natural Gas Geoscience >

2011 , Vol. 22 >Issue 2: 324 - 330

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.02.324

article

A Study of Abnormal Pressure Distribution and Formation Mechanism in Qiongdongnan Basin

Expand

1.Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,
Chinese Academy of Sciences,Lanzhou 730000,China;2.Graduate University of the Chinese
Academy of Sciences,Beijing 100049,China;3.Beijing Research Center of CNOOC,Beijing 100027,China.

Received date: 2010-05-10

Revised date: 2010-09-23

Online published: 2011-04-10

Fold

Abstract

Started from logging data,combined with the test pressure data and plentiful mud fluid data,distribution characteristics of formation pressure in Qiongdongnan basin is analyzed. On the base of these and combined with previous research results,we summarize the distribution of overpressure in the basin. That is,characteristics of individual wells can be summed up into four types,which include normal pressure,micro-super-pressure,super\|pressure and high pressure. High-pressure bladders appear on profile,which overpressure regimes can easily form in inner of sags. On the plane,high overpressure in the Lingshui Formation of Oligocene exists in Lingshui,Songnan-Baodao,Ledong Sag and so on. Generally，overpressure enhanced gradually from north to south,from west to east. On this basis,the mechanism of the basin overpressure is analyzed,and suggests that disequilibrium compaction caused by subsiding rate of up to 110m/Ma is the major factor for the formation of overpressure stratum. The formation of overpressure stratum is the result of subsiding rate of up to 105m/Ma,hydrocarbon-generation caused by high geothermal field,as well as weakened fault activity and enhanced sealing.

Key words： Qiongdongnan basin; Velocity spectrum; Mechanism of Overpressure; Plugging property.

Cite this article

ZHU Jian-Jun, ZHANG Xiao-Bao, ZHANG Gong-Cheng, LIU Fang, ZHANG Ming-Feng, CHEN Guo-Jun, XIA Yan-Qing . A Study of Abnormal Pressure Distribution and Formation Mechanism in Qiongdongnan Basin[J]. Natural Gas Geoscience, 2011 , 22(2) : 324 -330 . DOI: 10.11764/j.issn.1672-1926.2011.02.324

References

［1］Gong Zaisheng,Li Sitian,The Ocean Oil Field in China［M］.Beijing:Petroleum Industry Press,1998:183-190.［龚再升,李思田.中国近海大油气田［M］.北京:石油工业出版社,1998:183-190.］
［2］Hu Haiyan.Overpressure cause and it affects the reserve formation［J］.Natural Gas Geoscience,2004,15(1):99-101.［胡海燕.超压的成因及其对油气成藏的影响［J］.天然气地球科学,2004,15(1):99-101.］
［3］He Jiaxiong,Chen Shenghong,Liu Hailing,et al.Petroleum resource potential and advantageous exploration targets in Ying-Qiong basin,northern margin of South China Sea［J］.Natural Gas Geoscience,2008,19(4):492-498.［何家雄,陈胜红,刘海龄,等.南海北部边缘莺—琼盆地油气资源前景及有利勘探方向分析［J］.天然气地球科学,2008,19(4):492-498.］
［4］Wang Minfang.The character of overpressure and its relationship with the distribution of oil and gas,Qiongdongnan basin［J］.Marine Petroleum Exploitation,2002,23(1):15-22.［王敏芳.琼东南盆地超压特征及超压体与油气分布的关系［J］.海洋石油,2002,23(1):15-22.］
［5］Wu Jingwu.Structural Characteristics and Formative Mechanism of Southern Sag,Qiongdongnan Basin［D］.Hangzhou:Article of University of Zhejiang Province for Master Degree,2008:13-20.［吴敬武.琼东南盆地南部凹陷构造特征及形成机制［D］.杭州:浙江大学硕士学位论文，2008:13-20.］
［6］Li Chunquan,Chen Honghan,Zhang Shulin,et al.Pressure field and its evolutional characteristics in Qiongdongnan basin［J］.Xinjiang Oil Geology,2002,23（5）：389-392.［李纯泉,陈红汉,张树林,等.琼东南盆地压力场及其演化特征［J］.新疆石油地质,2002,23(5):389-392.］
［7］Zhu Guanghui,Chen Gang,Diao Yinghu,et al.Characteristics of geotherm-pressure field and its relationship with hydrocarbon migration and accumulation in Qiongdongnan basin,South Sea［J］.China Offshore Oil and Gas Geology,2000,14(1):29-36.［朱光辉,陈刚,刁应护,等.琼东南盆地温压场及其与油气运聚的关系［J］.中国海上油气:地质,2000,14(1):29-36.］
［8］Zhai Panpan,Zhang Jixi,Zhao Hong,et al.Formation mechanism and prediction method of abnormal high pressure［J］.Inner Mongolia Petrochemical Industry,2009,19:40-41.［翟盼盼,张纪喜,赵洪,等.异常高压成因机制及其预测方法［J］.内蒙古石油化工,2009,19:40-41.］
［9］Zhang Shiqi,Ji Youliang.Subsurface Geology of Oil and Gas Fields［M］.Beijing:University of Petroleum Press,2005:137-148.［张世奇,纪友亮.油气田地下地质学［M］.北京:石油大学出版社,2005:137-148.］
［10］Du Xu,Zheng Hongyin,Jiao Xiuqiong,et al.Abnormal pressure and hydrocarbon accumulation［J］.Earth Science Frontiers,1995,(4):137-148.［杜栩,郑红印,焦秀琼,等.异常压力与油气分布［J］.地学前缘,1995,(4):137-148.］
［11］Zeng Zhiping,Song Guoqi,Liu Kuiyuan.Overpressure mechanisms in Taoerhe sag of Chezhen depression［J］.Geological Science and Technology Information,2008,27(6):71-75.［曾治平,宋国奇,刘魁元.车镇凹陷套尔河洼陷地层超压成因机理［J］.地质科技情报,2008,27(6):71-75.］
［12］Zhang Yunfan,Sun Zhen,Guo Xingwei,et al.Tectonic subsidence characteristics of Qiongdongnan basin in Cenozoic［J］.Journal of Tropical Ocean,2008,27(5):30-36.［张云帆,孙珍,郭兴伟,等.琼东南盆地新生代沉降特征［J］.热带海洋学报,2008,27(5):30-36.］
［13］Mi Lijun,Zhang Gongcheng.Dynamical Studies of Hydrocarbon Migration and Accumulation in the Northern Deepwater Area of the South China Sea［M］.Beijing:Science Press，2008:120-150.［米立军,张功成.南海北部深水区油气成藏动力学研究［M］.北京:科学出版社,2008:120-150.］
［14］Shi Xiaobin,Qiu Xuelin,Xia Kanyuan,et al.Heat flow characteristics and its tectonic significance of South China Sea［J］.Journal of Tropical Oceanography,1998,22(2):63-73.［施小斌,邱学林,夏戡原,等.南海热流特征及其构造意义［J］.热带海洋学报,1998,22(2):63-73.］
［15］Jiang Zhenxue,Chen Zhangming,Zhang Mingxue.Research on the fault sealing in Qiongdongnan basin［J］.China Offshore Oil and Gas Geology,1998,12(2):91-96.［姜振学,陈章明,张明学.琼东南盆地断层封闭性研究［J］.中国海上油气:地质,1998,12(2):91-96.］

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References