【作者】 高丹；

【导师】 钟建华；

【作者基本信息】 中国石油大学 ， 地质学， 2010， 硕士

【摘要】 本文广泛查阅了前人大量文献,并吸收了东辛油田近年来关于研究区的主要研究和勘探成果,充分利用岩心、录井、测井、地震及岩心分析化验等资料,应用层序地层学、沉积学、地球物理学、石油地质学等多学科的新理论、新技术和新方法,首先对研究区沙四段层序地层进行了系统研究,将研究区沙四段划分为2个长期旋回,即沙四上和沙四下,2个中期旋回即沙四纯上和沙四纯下,8个短期旋回Cs1-Cs6,Cx1、Cx2,其中,Cs1-Cs6对应沙四纯上,Cx1、Cx2对应沙四纯下。通过对研究区物源和平面沉积规律的研究,研究区在Cx2、Cx1、Cs6砂组,主要发育由南部物源控制下的三角洲沉积相和滨浅湖滩坝沉积相;Cs5、Cs4砂组是南北物源发生转换的重要阶段,研究区在南北物源共同控制下主要发育曲流河三角洲和浅水浊积扇沟道沉积相;Cs3、Cs2、Cs1砂组,研究区主要发育由北部物源控制的扇三角洲和三角洲沉积相。研究区沙四段断层较为发育,研究区沙四段构造基本特征表现为平面“三分”特征,即中部为广利主体背斜,被NE-SW向断层复杂化;西侧为斜坡带,被东西向断层切割;东部为内部构造单一的向斜洼陷,周边被断层复杂化。依据研究区的沉积和构造特征,结合圈闭形态,研究区发现油气藏包括岩性、构造和构造-岩性三类。靠近断层处以断层-岩性复合油气藏为主,研究区向东进入广利主体构造抬升,呈现背斜形态,多以岩性上倾尖灭油气藏和断块油气藏居多,研究区地势相对低洼的区域以浊积岩性油气藏为主。根据研究区成藏规律的研究,针对研究区Cs5和Cs6两个砂组,提出四个有利目标区,营斜94井区、莱110井区、莱31井区、莱64井区。更多还原

【Abstract】 Based on the extensive document consulting and absorbed the study and exploration achievement on the survey region of the Dongxin Oil Field,a comprehensive analysis was given to the seismic data,core logging data,and core analysis data of this area.Under the guidance of the new theory,technology and method of the sequence stratigraphic theory,sedimentology,geophysics,petroleum geology and geochemistry,the Es4 member was devided into two long-term cycles,the upper member of Es4 and the lower member of Es4,two medium-term cycles,the Chunshang member of Es4 and the Chunxia member of Es4,and eight short-term cycles,Cs1-Cs6,Cx1,Cx2.The faults developed a lot in Es4 of the study area.The faults were devided into three tectonic units on plane,the Guangli antiline in the middle which was complicated by the NE-SW direction faults,the slope zone in the west which was incised by the EW direction faults,the Qingnan syncline in the east which was complicated by the surrounding faults.Based on the research of sediment provenance and the sedimentary rule,the survey region developed delta and beach bar faces under the control of the south provenance in the Cx2-Cs6 sand groups.Cs4 and Cs5 sand groups are the important phase when the south provenance was being replacing by the north provenance and meandering river delta and turbidite fan groove in the shallow water.The oil-gas reservoir model contains three kinds,lithologic,structural and structural- lithologic reservoirs.On the basis of the research on the pattern of oil and gas accumulation,aiming at the Chunshang 5th and Chunshang 6th sand groups,four favorable targets were pointed,Yingxie 94 well area,Lai 110 well area,Lai 31 well area,Lai 64 well area.更多还原