普光气藏地质特征研究方法综述
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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.
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.
引文
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[4]王一刚,张静,刘兴刚,等.四川盆地东北部下三叠统飞仙关组碳酸盐蒸发台地沉积相[J].古地理学报,2005,7(3):357- 371.
[5]张喜亭,谭秀成,毕建霞,等.普光气田飞仙关组鲕粒滩分布规律研究[J].油气地质与采收率,2009,16(2):8-11,16.
[6]苏立萍,罗平,罗忠,等.川东北飞仙关组鲕粒滩储层特征研究[J].天然气工业,2005,25(6):14-17.
[7]刘成川,向丹,王大志.川东北PG构造三叠系飞仙关组台缘鲕滩储层特征[J].天然气工业,2005,25(7):17-19.
[8]马永生,傅强,郭彤楼,等.川东北地区普光气田长兴—飞仙关气藏成藏模式与成藏过程[J].石油实验地质,2005,27(5): 455-460.
[9]吕宝凤,夏斌.中国海相碳酸盐岩地区油气成藏基本特征及勘探系统初探[J].油气地质与采收率,2005,12(5):21-23.
[10]马永生.普光气田天然气地球化学特征及气源探讨[J].天然气地球科学,2008,19(1):1-7.
[11]张奎华.川东北地区三叠系飞仙关组高硫化氢气藏成因探讨[J].油气地质与采收率,2006,13(2):47-49.
[12]刘殊,唐建明,马永生,等.川东北地区长兴组—飞仙关组礁滩相储层预测[J].石油与天然气地质,2006,27(3):332-339, 347.
[13]倪新锋,陈洪德,田景春,等.川东北地区长兴组—飞仙关组沉积格局及成藏控制意义[J].石油与天然气地质,2007,28(4): 458-465.
[14]雍世和,张超谟.测井数据处理与综合解释[M].东营:石油大学出版社,1996:211-213.
[15]孙耀庭,谭海芳,于世建.普光气田储层特征及测井解释方法[J].石油天然气学报,2008,30(1):83-87.
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