安岳气田高石梯区块下寒武统龙王庙组气藏开发潜力评价  

Evaluation on development potential in the Lower Cambrian Longwangmiao Formation,Gaoshiti block,Anyue gasfield,Sichuan Basin

作　　者：凡田友 江林[1] 聂权 赵文韬 伍亚 耿超 邹翔 李弢[1] Fan Tianyou;Jiang Lin;Nie Quan;Zhao Wentao;Wu Ya;Geng Chao;Zou Xiang;Li Tao(Southern Sichuan Gas District,PetroChina Southwest Oil&Gasfield Company,Luzhou,Sichuan 646000,China)

机构地区：[1]中国石油西南油气田公司蜀南气矿

出　　处：《天然气勘探与开发》2021年第2期44-55,共12页Natural Gas Exploration and Development

摘　　要：安岳气田高石梯区块下寒武统龙王庙组气藏自高石6井投入试采以来,表现出单井稳产能力强、井控储量大的特征,展现了气藏较大的勘探开发潜力。通过对区内实钻显示、岩屑、取心、测井、测试、生产动态等静动态资料综合研究后认为:①与受构造控制的磨溪主体区块龙王庙组气藏不同,高石梯区块龙王庙组储层主要受沉积相控制,颗粒滩相储层发育,滩间海储层欠发育;②纵向上龙二段储层较发育,主要发育4个滩体;③实钻、试采证实滩体内储层连通性较好,流体分布受构造控制,滩体间储层欠发育,连通性差,每个滩体具有不同的气水界面,处于构造低部位滩体仍然含气;④通过储层分布特征及流体分布特征研究,优选出3个开发有利区块共计221 km^(2),估算储量达375×10^(8) m^(3)。For Gaoshi 6 well,Gaoshiti block,Anyue gasfield,its well testing in some gas reservoirs of the Lower Cambrian Longwangmiao Formation reveals stable production capability and high well-controlled reserves,indicating a great exploration and development potential in Longwangmiao gas reservoirs.Based on both static and dynamic data about gas show,cuttings,cores,well logging,test,and production performance,a comprehensive study was conducted.Results indicated that:(1)unlike Longwangmiao Formation in Moxi block controlled by local structure,that in Gaoshiti block is governed by local sedimentary facies with well-developed granular beach reservoirs and underdeveloped interbeach marine reservoirs;(2)vertically,Longwangmiao 2 reservoirs are well developed mainly with 4 beach bodies;(3)drilling and production test practices also illustrate that some reservoirs within beach bodies are featured by good connectivity,and fluid distribution is controlled by local structure.However,others among beach bodies are not well developed with poor connectivity.Each beach body has its respective gas-water contact.Some gas-bearing beach bodies can still be found at structural low;and(4)through study about the reservoir and fluid distribution,three favorable belts with an area of 221 km^(2) and estimated reserves of 375×10^(8) m^(3) have been optimized.

关 键 词：安岳气田 高石梯区块 龙王庙组气藏 沉积相 气水识别 开发潜力 

分 类 号：P618.13[天文地球—矿床学]