断陷盆地深层优质碎屑岩储集层发育机理——以渤海湾盆地饶阳凹陷为例  

Formation mechanisms of good-quality clastic reservoirs in deep formations in rifted basins: A case study of Raoyang sag in Bohai Bay Basin, East China

作　　者：金凤鸣[1] 张凯逊 王权 牛新杰 于作刚 白国平[3] 赵璇 JIN Fengming;ZHANG Kaixun;WANG Quan;NIU Xinjie;YU Zuogang;BAI Guoping;ZHAO Xuan(PetroChina Dagang Company, Tianjin 300280, China;Institute of Geomechanics, Chinese Academy of Geological Sciences,Beijing 100081, China;College of Geosciences, China University of Petroleum, Beijing 102249, China;PetroChina Huabei Company, Renqiu 062552, China;CNPC Bohai Drilling Engineering Company Limited, Renqiu 062552, China)

机构地区：[1]中国石油大港油田公司,天津300280 [2]中国地质科学院地质力学研究所,北京100081 [3]中国石油大学(北京)地球科学学院,北京102249 [4]中国石油华北油田公司,河北任丘062552 [5]渤海钻探第二录井公司,河北任丘062552

出　　处：《石油勘探与开发》2018年第2期247-256,共10页Petroleum Exploration and Development

基　　金：国家油气重大科技专项(2011ZX05006-005);国土资源部油气中心科技项目(2015YQKYQ0401)

摘　　要：基于岩心观察、显微镜和扫描电镜观察以及岩石物性测试结果,对渤海湾盆地饶阳凹陷古近系沙河街组三段砂岩储集层的基本特征进行分析,揭示深层优质碎屑岩储集层发育机理。地层超压、碎屑成分和结构成熟度、早期油气充注和溶蚀作用是控制深层储集层孔隙保存及形成的重要因素。压实作用是孔隙破坏的主要因素,地层超压作用可以有效地保存原生孔隙,同时较高的成分成熟度与中等的结构成熟度有助于提高岩石抗压实强度,也有利于保护原生孔隙。早期油气充注可使成岩作用暂时中止,从而抑制胶结作用对储集层孔隙的破坏。有机酸充注后,形成了相当数量的次生孔隙,局部改善储集空间物性。在进行深层勘探有利储集层区评价和预测时,应综合考虑地层超压、油气充注、沉积物原始组分与结构及成岩作用等多因素的叠合效应。In order to reveal the development mechanism of deep quality clastic rock reservoir,the basic characteristics of Sha-3Member of the Shahejie Formation in the Raoyang sag of Bohai Bay Basin are analyzed based on observation of cores,observation of thin sections under microscope and SEM,and test results of petrophysical properties.It is found that high compositional and textural maturity,early oil charging,and dissolution are the main factors controlling the formation and preservation of pores in deep reservoirs.Compaction is the major factor destructing pores,whereas formation overpressure is conducive to the preservation of original pores,high compositional andmedium textural maturity can enhance the resistance of the formation to compaction and protect primary pores.Early oil charging could lead to temporary cessation of diagenesis and thus inhibit the destructive impact of cementation on pores.When organic acids entered reservoir formations,considerable amounts of secondary pores were formed,leading to the improvement of petrophysical properties in local parts.When predicting good quality belt in exploration of deep formations,it is recommended that the superimposing effects of the multiple factors(overpressure;early oil charging;compositional and textural maturity;diagenesis)be taken into consideration.

关 键 词：渤海湾盆地 饶阳凹陷 断陷盆地 沙河街组 成岩作用 高孔隙带 溶蚀作用 

分 类 号：TE122.2[石油与天然气工程—油气勘探]