致密砂岩气田储量分类及井网加密调整方法——以苏里格气田为例

doi:10.7623/syxb201711009

石油学报 ›› 2017, Vol. 38 ›› Issue (11): 1299-1309.DOI: 10.7623/syxb201711009

致密砂岩气田储量分类及井网加密调整方法——以苏里格气田为例

郭智, 贾爱林, 冀光, 甯波, 王国亭, 孟德伟

中国石油勘探开发研究院北京 100083

收稿日期:2017-01-13 修回日期:2017-07-01 出版日期:2017-11-25 发布日期:2017-12-08
通讯作者: 郭智,男,1986年7月生,2008年获中国石油大学(华东)学士学位,2014年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院工程师,主要从事气田开发地质工作。Email:guozhi2014@petrochina.com.cn
作者简介:郭智,男,1986年7月生,2008年获中国石油大学(华东)学士学位,2014年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院工程师,主要从事气田开发地质工作。Email:guozhi2014@petrochina.com.cn
基金资助:
国家重大科技专项"致密气富集规律与勘探开发关键技术"（2016ZX05047）资助。

Reserve classification and well pattern infilling method of tight sandstone gasfield:a case study of Sulige gasfield

Guo Zhi, Jia Ailin, Ji Guang, Ning Bo, Wang Guoting, Meng Dewei

PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Received:2017-01-13 Revised:2017-07-01 Online:2017-11-25 Published:2017-12-08

摘要/Abstract

摘要：

苏里格气田是中国致密砂岩气田的典型代表，其储层物性差，有效砂体规模小，分布频率低，非均质性强，区块之间差异明显。依靠600 m×800 m的主体开发井网难以实现储量的整体有效动用，采收率仅约30%，需要开展储量分类评价，针对各类储量区分别实施井网加密调整。优选气田中部苏14区块为研究区，通过密井网区精细解剖、干扰试井分析明确了储层的发育频率及规模；以沉积相带为约束，结合储量丰度值、储层叠置样式、差气层影响和生产动态特征，将气田储量分成5种类型。从I类—V类，储层厚度减小，连续性变差，储量品位降低，单井产量变低。依据密井网实际生产数据与数值模拟结果，针对各储量类型，研究了井网密度、干扰程度和采收率的关系，论证了合理井网密度下的单井开发指标。在现有的经济及技术条件下，各类储量区合适井网密度为2~4口/km²，气田最终采收率约为50%。通过系统研究确定了致密砂岩气田复杂地质条件下的储量构成，为开发中后期加密调整方案的编制提供了地质依据。

关键词: 致密砂岩气, 苏里格气田, 储量分类评价, 储层叠置样式, 井网加密调整

Abstract:

As a typical representative of China's tight sandstone gas field, Sulige gasfield possesses the characteristics of poor reservoir property, small-scale effective sand bodies, low distribution frequency, strong heterogeneity and obvious difference between the blocks. It is difficult to realize the overall effective use of reserves by relying on the main development well pattern of 600 m×800 m; and the recovery efficiency is only about 30%. Thus, it is necessary to conduct reserve classification and evaluation as well as implement well pattern infilling for various types of reserves. Su 14 block in central Sulige gasfield was taken as the study area. Through the fine exploration of dense drilling zones and the interference well test analysis, the reservoir development frequency and scale were clearly identified. Constrained by sedimentary facies belt, gas field reserves were divided into five types in terms of reserve abundance, reservoir superimposed style, poor gas-reservoir effect and production performance characteristics. From Type I to Type V, reservoir thickness is reduced with the continuity worsening, the reserve grade is declining, and the yield of single well is reduced. According to the actual production data of dense well pattern, the modeling and numerical simulation results, the relationships among well pattern density, interference degree and recovery efficiency were studied for each type of reserves to demonstrate the development indexes of single well under reasonable well pattern density. Under current economic and technical conditions, the appropriate well pattern density is 2-4 wells/km² for various types of reserve areas, and the ultimate recovery efficiency of gas field is about 50%. Moreover, the reserve configuration under complex geological conditions of tight sandstone gas field was determined through systematical study, providing a geological basis for the preparation of well pattern infilling scheme during the mid-late development stage.

Key words: tight sandstone gas, Sulige gasfield, reserve classification evaluation, reservoir superimposed style, well pattern infilling

中图分类号:

TE377

郭智, 贾爱林, 冀光, 甯波, 王国亭, 孟德伟. 致密砂岩气田储量分类及井网加密调整方法——以苏里格气田为例[J]. 石油学报, 2017, 38(11): 1299-1309.

Guo Zhi, Jia Ailin, Ji Guang, Ning Bo, Wang Guoting, Meng Dewei. Reserve classification and well pattern infilling method of tight sandstone gasfield:a case study of Sulige gasfield[J]. Acta Petrolei Sinica, 2017, 38(11): 1299-1309.

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致密砂岩气田储量分类及井网加密调整方法——以苏里格气田为例

Reserve classification and well pattern infilling method of tight sandstone gasfield:a case study of Sulige gasfield

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