摘要
普光气藏含气层系二叠系长兴组—飞仙关组为海相碳酸盐岩。储层受沉积环境和后期成岩作用演化的影响,具有储集岩石类型复杂、储层物性纵横向差异大、储集空间类型多样、储层非均质性强等特点;气藏埋藏深、含气井段长、有边底水、硫化氢含量高,增加了气藏开发难度。为此,围绕气藏产能建设,形成了4种普光气藏地质特征研究方法:①基于测井相—地震相的沉积微相识别方法;②以测井约束稀疏脉冲波阻抗反演为主的储层预测方法;③以测井和测试资料相结合为主的气水层测井识别方法;④以地震数据体结构异常预测含气范围方法。明确了气藏有利沉积相带和优质储层展布规律,预测了有利含气范围,并确定出气层下限。
Puguang gas fieldis mainly composed of marine carbonate rocks in the gas-bearing intervals of Changxing formation in Permian system and Feixianguan formation in Triassic System.The reservoir is not only affected by the sedimentary setting,but also controlled by the evolution of the metagenesis.It is characterized by the complicated types of reservoir rocks,great differences of physical properties in planar and vertical direction,various kinds of pore spaces,great heterogeneity in reservoir as well as the deeply buried gas zone,long-range of gas interval,bottom and edge water and high-sulfur content,which have resulted more difficulties in the development of gas field.In order to build the gas production capacity,we have developed a series of techniques,such as the technique of identifying sedimentary microfacies based on the logging and seismic phases,the technique of predicating reservoir based on the inversion of sparse impulse impedance by logging,the technique for identifying gas-water interval by logging and well-testing data,and the technique of predicating the gas-bearing zone by abnormal of seismogram so as to understand the distribution of favorable sedimentary facies and high-quality reservoirs, and predict the favorable gas-bearing area and define the lower limit of the gas zone.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第3期45-47,62,共4页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"高含硫气藏安全高效开发技术"(2008ZX05017)
关键词
碳酸盐岩
沉积微相
储层预测
含气范围预测
地质特征
普光气藏
carbonate rocks
sedimentary micro-facies
reservoir prediction
prediction of gas reservoir location
geological features
Puguang gas field
