珠江口盆地H油田珠江组L30层深水重力流复合砂体的发现及其对开发的意义  

Discovery of deep water gravity flow composite sandbody at L30 layer of Zhujiang formationin H oilfield of Zhujiangkou basin and its significance for development

作　　者：高玉飞 范廷恩 戴宗 吴星宝 王海峰 张晶玉 宋建虎 张天佑 范虎 李晨 GAO Yufei;FAN Tingen;DAI Zong;WU Xingbao;WANG Haifeng;ZHANG Jingyu;SONG Jianhu;ZHANG Tianyou;FAN Hu;LI Chen(CNOOC Research Institute,Beijing 100028,China;Research Institute of Shenzhen Branch of CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518064,China)

机构地区：[1]中海石油研究总院,北京100028 [2]中海石油(中国)有限公司深圳分公司研究院,广东深圳518064

出　　处：《中国科技论文》2021年第5期487-493,共7页China Sciencepaper

基　　金：国家科技重大专项(2011ZX05024-001)。

摘　　要：为探究珠江口盆地H油田珠江组下段L30层深水重力沉积等问题,在层序地层学理论指导下,首先利用古地貌分析技术分析了H油田L30层的沉积古地貌,确定了西北和东南2个沉积中心,且东南沉积中心高于西北沉积中心;进而通过对岩心5种典型特征的总结,判断位于东南沉积中心的H-4井区发育重力流沉积,并总结了其早期滑塌变形—中期颗粒流沉积—晚期深水泥岩沉积的复合砂体沉积模式,该模式的发现为本地区岩性油藏的勘探开发提供了重要参考;最后通过地震波形指示反演及复合砂体刻画技术确定了重力流复合砂体的沉积范围并计算其储量为1.8×10^(6)m^(3),将复合砂体刻画前的“1注3采4口水平井”的开发方案调整为“1注1采2口水平井”,规避了风险投资,提高了油田经济效益。To study the gravity deposits of L30 layer in lower part of Zhujiang formation of Zhujiangkou basin,based on the guidance of sequence stratigraphy theory,the sedimentary Palaeogeomorphology of L30 layer in H oilfield was firstly analyzed by using Palaeogeomorphological analysis technology,and two sedimentary centers were determined in northwest and southeast respectively.The southeast sedimentary center was higher than the northwest sedimentary center.Then,by summarizing five typical characteristics of core,it was judged that gravity flow deposits are developed in the southeast sedimentary center which the H-4 well located.And a composite sandbody depositional model which early collapse deformation-medium term grain flow deposits-late deep water mudstone deposits was summarized.The discovery of this model provides an important reference for exploration and development of lithologic reservoirs in this area.Finally,gravity was determined by seismic waveform indication inversion and composite sandbody characterization technology.The depositional range of flow composite sandbody wascalculated and its reserve is 1.8×106 m 3.The development plan of 4 horizontal wells with 1 injection well and 3 production wells before describing of composite sandbody is adjusted to 2 horizontal wells with 1 injections well and 1 production well,which avoides risk investment and improves economic efficiency.

关 键 词：古地貌 深水重力流 颗粒流 复合砂体 波形指示反演 

分 类 号：TE51[石油与天然气工程—油气田开发工程]