轮南油田LN10井区三叠系T_(I)油组沉积相研究  

Study on sedimentary facies of Triassic T_( I) oil group in LN10 well area of Lunnan Oilfield

作　　者：吴梅莲 刘永福 晏楠 周碧辉 黄时祯 WU Meilian;LIU Yongfu;YAN Nan;ZHOU Bihui;HUANG Shizhen(Lunnan Oil and Gas Production Management Area of Tarim Oilfield Company,PetroChina,Korla 841000,Xinjiang,China)

机构地区：[1]中国石油塔里木油田分公司轮南采油气管理区,新疆库尔勒841000

出　　处：《石油地质与工程》2024年第6期21-28,共8页Petroleum Geology and Engineering

摘　　要：轮南油田LN10井区三叠系T_(I)油组是区内重要的含油气层系,由于其沉积相类型和沉积微相特征认识不清,制约了油藏的开发调整。通过岩石薄片分析、岩心描述、测井相划分,结合地震多属性分析技术,认识到T_(I)油组自下而上依次为辫状河沉积-三角洲前缘沉积-曲流河沉积,其中,T_(I)^(3)砂层组储层以辫状河道、水下分流河道砂体为主,河道方向为北东-南西向;T_(I)^(2)砂层组为曲流河沉积,储层以点坝砂体为主。根据沉积微相研究成果,LN10T_(I)油组储层物性受控于沉积微相,油藏类型为受河道边界砂体尖灭线和构造等高线共同控制的构造-岩性油藏,该研究成果为油藏开发调整提供了方向。Triassic T_(I)oil group in Lunnan 10 well area of Lunnan Oilfield is an important oil and gas bearing formation in this area.Because of the unclear understanding of sedimentary facies types and sedimentary microfacies characteristics,the development and adjustment of the reservoir is restricted.Through thin section analysis,core description,logging phase division,combined with seismic multi-attribute analysis,it is recognized that the T_(I)oil group consists of braided river sediments-delta front sediments-meander river sediments from bottom to top.The reservoir of T_(I)^(3) sand group is dominated by braided channel and underwater distributary channel sand body,and the channel direction is northeast-southwest.The T_(I)^(2) sand group is meandering river deposition,and the reservoir is dominated by point bar sand body.According to the analysis of sedimentary microfacies research results,the reservoir physical properties of LN10T_(I)oil group are controlled by sedimentary microfacies,and the reservoir type is a structural-lithologic reservoir controlled by the pinch-out line of channel boundary sand body and structural contour line,which provides a good guidance for reservoir development and adjustment.

关 键 词：轮南油田 曲流河沉积 地震多属性分析技术 构造-岩性油藏 

分 类 号：TE121.3[石油与天然气工程—油气勘探]