Diagenesis of Sandy Conglomerate Reservoir in Northern Steep Slope of Bonan Subsag
Received date: 2010-10-21
Revised date: 2010-12-16
Online published: 2011-04-10
ased on bulk analyses of casted thin section,scanning electro microscope,cathode luminescence and X radial-diffract,the types and main controlling factors of sandy conglomerate reservoir diagenesis in north steep slope of Bonan subsag were studied. The diagenetic evolution stage was divided and the controlling functions of different diagenetic facies to reservoir quality were also analysed. The results indicated that the lower Es3 and Es4 sandy conglomerate reservoirs were in the middle diagenetic phase A1 to A2,which corresponded to the main hydrocarbon generating period of organic matter. Consolidation was the key factor to make reservoir low quality,cementation the second. Clay mineral dissolution was the main diagenesis improving reservoir quality. Studied area developed four diagenetic facies of strong consolidation diagenetic facies,later carbonate cemented diagenetic facies,weak consolidation and weak cemented diagenetic facies,and unstable component corrosion diagenetic facies,of which each played certain role in controlling physical property of reservoir,and the reservoir characteristic was the combined action of four diagenetic facies. Unstable component corrosion diagenetic facies formed the best reservoir. Reservoirs controlled by weak consolidation and weak cemented diagenetic facies had good physical property. Reservoirs controlled by strong consolidation and later carbonate cemented diagenetic facies have bad physical property. Studies above are of great importance in looking for favorable reservoirs.
Key words： Bonan subsag; Sandy conglomerate reservoir; Diagenesis; Diagenetic stage.
ZAN Ling, ZHANG Zhi-Huan, WANG Shun-Hua, FENG Wu-Jun, ZHANG Li-Sheng, XING Hui . Diagenesis of Sandy Conglomerate Reservoir in Northern Steep Slope of Bonan Subsag[J]. Natural Gas Geoscience, 2011 , 22(2) : 299 -306 . DOI: 10.11764/j.issn.1672-1926.2011.02.299
［1］Zhang Zhihuan,Zeng Yantao,Zhang Xuecai.The geochemical characteristics and source analysis of crude oil from the fourth member of Shahejie Formation in Bonan sub-sag,Zhanhua sag［J］.Geoscience,2004,18(4):578-585.［张枝焕,曾艳涛,张学才.山东沾化凹陷渤南洼陷沙四段原油的地球化学特征及油源分析［J］.现代地质,2004,18(4):578-585.］
［2］Liu Jiaduo,Wu Fuqiang,Tian Jingchun.The sedimentary environment analysis of the upper part of the Shasi Member in Bonan subsag［J］.Mineral Petroleum,2001,21(3):8-15.［刘家铎,吴富强,田景春.胜利油区渤南洼陷沙四上段沉积环境分析［J］.矿物岩石,2001,21(3):8-15.］
［3］Wu Fuqiang.Sedimentary facies classification of turbidite of upper part of the Shasi Member in Bonan sag,Shengli oilfield［J］.Xinjiang Petroleum Geology,2004,25(3):251-253.［吴富强.渤南洼陷沙四上亚段浊积体沉积相划分［J］.新疆石油地质,2004,25(3):251-253.］
［4］[KG*4/5]An Aiqin,Ji Youliang,Shan Jingfu.Diagenesis and physica property characteristis of the upper Shasi Member reservoir in Bonan subsag［J］.Shanghai Geology,2007,(1):11-16.［安爱琴,纪友亮,单敬福.渤南洼陷沙四上亚段储层成岩作用及物性特征［J］.上海地质,2007,(1):11-16.］
［5］Chen Xin,Zhong Jianhua,Yuan Jing,et al.Characteristics of clay mineral and its hydrocarbon significance in Paleogene clastic reservoir of Bonan sag［J］.Acta Petrolei Sinica,2009,30(2):201-207.［陈鑫,钟建华,袁静,等.渤南洼陷深层碎屑岩储集层中的黏土矿物特征及油气意义［J］.石油学报,2009,30(2):201-207.］
［6］Houseknecht D W.Assessing the relative importance of compaction processes and cementation to reduction of porosity in sandstones ［J］.AAPG Bulletin,1987,71:633-642.
［7］Ying Fengxiang,Luo Ping,He Dongbo,et al.Diagenesis and Diagenesis Numerical Simulation of Clastic Reservoir in China′s Petroliferous Basins［M］.Beijing:Petroleum Industry Press,2004:91-94.［应凤祥,罗平,何东博,等.中国含油气盆地碎屑岩储集层成岩作用与成岩数值模拟［M］.北京:石油工业出版社,2004:91-94.］［8］Ji Youliang.Petroleum Reservoir Geology［M］.Dongying:China University of Petroleum Press,2009:74-75.［纪友亮.油气储层地质学［M］.东营:中国石油大学出版社,2009:74-75.］
［9］Chen Guojun,Du Guichao,Zhang Gongcheng,et al.Diagenesis and main factors controlling the Tertiary reservoir properties of the Panyu low-uplift reservoirs,Pearl River Mouth basin［J］.Natural Gas Geoscience,2009,20(6):854-861.［陈国俊,杜贵超,张功成,等.珠江口盆地番禺低隆起第三系储层成岩作用及物性影响因素分析［J］.天然气地球科学,2009,20(6):854-861.］
［10］Liu Zhen,Shao Xinjun,Jin Bo,et al.Co-effect of depth and burialtime on the evolution of porosity for classic rocksduring the stage of compaction［J］.Geoscience,2007,21(1):125-132.［刘震,邵新军,金博,等.压实过程中埋深和时间对碎屑岩孔隙度演化的共同影响［J］.现代地质,2007,21(1):125-132.］
［11］Zhu Xiaomin,Zhang Zhihuan,Zhong Dakang,et al.Characteristics and Evaluation of Paleogene Clastic Reservoirs in Jiyang Depression［M］.Beijing:Science Press,2008:172-173.［朱筱敏,张枝焕,钟大康,等.济阳拗陷古近系碎屑岩储层特征和评价［M］.北京:科学出版社,2008:172-173.］
［12］Chen Yongqiao,Yu Xinghe,Zhou Xingui,et al.Research on diagenetic evolutive succession and occurrence of secondary porosity of lower Tertiary in different structural belt of Dongying depression［J］.Natural Gas Geoscience,2004,5(1):68-74.［陈永峤,于兴河,周新桂,等.东营凹陷各构造区带下第三系成岩演化与次生孔隙发育规律研究［J］.天然气地球科学,2004,5(1):68-74.］
/
| 〈 |
|
〉 |
甘公网安备 62010202000678号