CAJ | 학술논문

通过对东海丽水—椒江凹陷的构造、沉积地层和成藏要素的分析,系统阐述了其成藏条件。结果表明：丽水—椒江凹陷古新世主断陷期分为4幕断陷,其中初始断陷Ⅰ幕以湖相沉积环境为主,之后过渡为海相沉积环境,该凹陷存在3组烃源岩及3套储盖组合,其中下古新统月桂峰组湖相暗色泥岩有机质丰度高,且其类型以Ⅱ型为主,生烃潜力良好,为该区主力烃源岩;古新统储集层以砂岩为主,其中灵峰组和月桂峰组砂岩为Ⅲ—Ⅳ类储层,明月峰组砂岩为Ⅲa—Ⅱb类储层,物性受凹陷内顶封型异常高压系统改造优化。断陷早期的（扇）三角洲、滨湖、滨海砂体和上灵峰组上部及明月峰组下部的浅海泥构成的下储盖组合靠近主力烃源岩层,且异常高压系统增储滞排,因此储盖配置条件良好,勘探前景佳。预测凹陷内洼槽带生烃中心上方、灵峰潜山两侧及丽西次凹西斜坡的优势成藏构造带是研究区内有利的远景勘探区带,并识别划分出三大类共11个有利构造带。
통과대동해려수—초강요함적구조、침적지층화성장요소적분석,계통천술료기성장조건。결과표명：려수—초강요함고신세주단함기분위4막단함,기중초시단함Ⅰ막이호상침적배경위주,지후과도위해상침적배경,해요함존재3조경원암급3투저개조합,기중하고신통월계봉조호상암색니암유궤질봉도고,차기류형이Ⅱ형위주,생경잠력량호,위해구주력경원암;고신통저집층이사암위주,기중령봉조화월계봉조사암위Ⅲ—Ⅳ류저층,명월봉조사암위Ⅲa—Ⅱb류저층,물성수요함내정봉형이상고압계통개조우화。단함조기적（선）삼각주、빈호、빈해사체화상령봉조상부급명월봉조하부적천해니구성적하저개조합고근주력경원암층,차이상고압계통증저체배,인차저개배치조건량호,감탐전경가。예측요함내와조대생경중심상방、령봉잠산량측급려서차요서사파적우세성장구조대시연구구내유리적원경감탐구대,병식별화분출삼대류공11개유리구조대。
Jiyuan area is one of the key oil and gas exploration area within the basin. Based on the research of source rocks, reservoir rocks, hydrocarbon migration and traps, this paper synthetically analyzed the hydrocarbon accumulation conditions of Chang 2 oil reservoir set in Jiyuan area. The result shows that hydrocarbon of Chang 2 oil reservoir mainly comes from Chang 7 source rocks. The reservoir in the study area is mostly underwater distributary channel sand bodies, and sandstone is mainly composed of arknse, lithic arkose, with little feldspathie lithic sandstone, so it belongs to moderate porosity and low permeability reservoir. Compaction, cementation and dissolution are the main diagenesis lypes. The abnormal high pressure from Chang 7 oil reservoir set drives the nil generated from Chang 7 source rocks up to Chang 2 oil reservoir set. The oil in Chang 2 oil reservoir set is mainly Irapped by structural-lithologic trap, with local area by structural trap and lilhologic trap. The thick interdistribulary mudstone developed in Chang 2 oil reserw,ir set plays the necessary role as the shieht and cap rock of Chang 2 oil reservoir set.