轮南油田三叠系隐蔽油藏综合地质研究  

Comprehensive Geology Characterization of Triassic Subtle Reservoirs in Lunnan Oilfield

作　　者：杨彦东[1] Yang Yandong(PetroChina Liaohe Oilfield Company,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油辽河油田分公司

出　　处：《特种油气藏》2019年第5期51-55,共5页Special Oil & Gas Reservoirs

基　　金：中国石油重大科技专项“塔里木油田勘探开发关键技术研究与应用”(2014E-2107)

摘　　要：针对轮南油田3井区非主力层T2^0小层砂体薄、井控程度低、油水关系矛盾、砂体展布不明等问题,采用精细地层对比、高分辨率储层反演、低阻油层识别等技术,多学科多角度有机结合,提出"鞍桥"(相邻2个正向构造之间最高连接部位)是油气调整运移通道的概念,突破了原有T20砂体分布零散、不连续、不成规模的判断。研究结果表明:T2^0小层为一个具有统一油水界面的隐蔽型油藏,实现了该油田滚动增储190×10^4t,运用该项成果成功实现了老油田增储建产目的,原油产量达到5×10^4t/a。该研究可为其他类似隐蔽油藏的研究提供参考。The non-major T2^0 layer in the Block 3 of Lunnan Oilfield is characterized by thin sandbody thickness,low well-control level,complex oil-water distribution,unclear sandbody distribution,etc.The fine stratigraphic contrast,high-resolution reservoir inversion and low-resistivity oil layer identification were used to achieve multi-disciplinary and multi-angle combination and comprehensively characterize the geology.A "saddle bridge" concept is proposed as the hydrocarbon migration and adjustment channel,which breaks through the original understanding of disperse sandbody distribution,discontinuous sandbody distribution and small-scale of T2^0 layer.Research indicates that the T2^0 layer is considered as a subtle oil reservoir (structure-lithology reservoir) with a uniform oil-water interface,which realizes the rolling reserve increment of 190×10^4 t in this oilfield.This achievement has successfully gain the reserve increase and productivity construction of long-history oilfield,and the annual field oil production rate reaches 5×10^4t.This research could provide certain reference for the investigation of other similar subtle reservoirs.

关 键 词：隐蔽油藏 薄砂层 低阻油层 鞍桥 运移通道 成藏模式 

分 类 号：TE321[石油与天然气工程—油气田开发工程]