安岳气田龙王庙组气藏地质特征与开发技术政策  

Geological characteristics and development strategies for Cambrian Longwangmiao Formation gas reservoir in Anyue gas field,Sichuan Basin,SW China

作　　者：李熙喆[1] 郭振华[1] 万玉金[1] 刘晓华[1] 张满郎[1] 谢武仁[1] 苏云河[1] 胡勇[1] 冯建伟[2] 杨炳秀 马石玉[1] 高树生[1] 

机构地区：[1]中国石油勘探开发研究院,河北廊坊065007 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [3]中国石油勘探与生产分公司,北京100007

出　　处：《石油勘探与开发》2017年第3期398-406,共9页Petroleum Exploration and Development

基　　金：中国石油天然气股份有限公司重大科技专项"深层油气藏开发关键技术"(2014E-3203)

摘　　要：综合地震、钻井、测井、生产动态等资料,针对四川盆地安岳气田磨溪区块下寒武统龙王庙组储集层特征与展布、气水分布等影响开发效果的关键地质问题开展研究,确定开发技术对策。结果表明:(1)磨溪区块垂向发育4期颗粒滩体,平面呈现"两滩一沟"格局;(2)储集层可分为溶蚀孔洞、溶蚀孔隙和基质孔隙3种类型,有效储集层以溶蚀孔洞和溶蚀孔隙型为主;(3)储集层基质物性较差,受高角度构造缝影响,整体表现为低孔、中—高渗特征;(4)气藏由西向东,气水界面逐渐降低,呈"三段式"结构,建产区统一气水界面为-4 385 m。在气藏地质特征认识基础上,结合数值模拟结果与国内外相似气田开发经验,确定开发技术政策:以颗粒滩主体发育区作为优先建产目标区;在构造高部位集中布井,延缓边水非均匀推进速度,延长气田稳产期;部署水平井,提高单井产能;确定气井合理配产和调峰气井产量,提升气藏开发效果。Seismic, drilling, logging and production performance data were analyzed to study the key geological factors such as reservoir properties and gas/water distribution, which influence the development of the Lower Cambrian Longwangmiao reservoirs in the Moxi block, Anyue gas field, Sichuan Basin, and the development strategies are established. The results indicate that： （1） Four stages of grain shoals developed longitudinally and two main shoals with one trench formed laterally in the development area; （2） Three types of reservoirs are identified, which are reservoir with millimeter sized dissolved vugs, reservoir with solution pores, and reservoir with inter-particle/inter-crystal pores; （3） Low matrix porosity but mid-to-high permeability affected by developed high-dip fractures; and （4） Three gas/water contacts （GWC） can be defined and step down from west to east, with a unique gas/water contact of-4 385 m in the target developing area. Based on geologic characterization, reservoir simulation and case study of similar gas reservoirs, the development strategies are made： to select the main grain shoal area as the prior production area; to locate wells on the structural high to delay edge water breakthrough and prolong stable production; to drill horizontal wells enhancing single well deliverability; to keep reasonable production of wells for improving the production effect.

关 键 词：安岳气田 磨溪区块 龙王庙组 碳酸盐岩气藏 地质特征 开发技术政策 

分 类 号：TE344[石油与天然气工程—油气田开发工程]