Tight sandstone gas reservoir,Geological knowledge database,Reserves recalculating,Classified evaluation,"/> 基于储层地质知识库约束的致密砂岩气藏储量评价——以鄂尔多斯盆地苏里格气田苏14区块为例

天然气地球科学

• 天然气地质学 • 上一篇    下一篇

基于储层地质知识库约束的致密砂岩气藏储量评价——以鄂尔多斯盆地苏里格气田苏14区块为例

张吉,侯科锋,李浮萍,田敏,张志刚   

  1. 1.中国石油长庆油田分公司苏里格气田研究中心,陕西 西安 710018;
    2.低渗透油气田勘探开发国家工程实验室,陕西 西安710018;
    3.中国石油长庆油田分公司勘探开发研究院,陕西 西安 710018
  • 收稿日期:2017-04-26 修回日期:2017-08-03 出版日期:2017-09-10 发布日期:2017-09-10
  • 作者简介:张吉(1973-),男,四川南充人,高级工程师,博士,主要从事苏里格气田开发地质研究与科研管理工作. E-mail:zhangji_cq@petrochina.com.cn。
  • 基金资助:

    国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(编号:2016ZX05050);中国石油天然气股份有限公司科技专项“长庆气田稳产及提高采收率技术研究”(编号:2016E-0509)联合资助.

Reserves evaluation of tight sandstone gas reservoir based on reservoir geological knowledge database:A case study of Su 14 block in Sulige Gasfield,Ordos Basin

Zhang Ji,Hou Ke-feng,Li Fu-ping,Tian Min,Zhang Zhi-gang   

  1. 1.Sulige Gasfield Research Center of Changqing Oilfield Company,PetroChina,Xi’an 710018,China;
    2.State Engineering Laboratory of Low Permeability Oil & Gasfield Exploration and Development,Xi’an 710018,China;
    3.Research Institute of Petroleum Exploration and Development of Changqing Oilfield Company,PetroChina,Xi’an 710018,China
  • Received:2017-04-26 Revised:2017-08-03 Online:2017-09-10 Published:2017-09-10

摘要:

鄂尔多斯盆地苏里格气田属于典型的致密砂岩气藏,储层非均质性强、提交储量时样本数据有限,储量计算结果存在一定的误差。以苏里格气田14区块盒8段、山1段致密砂岩气藏为研究对象,提出以储层地质知识库为约束的储量复算思路与方法。以气田密井网区储层地质知识库为指导,对研究区有效储层进行精细描述,刻画含气边界的基础上,按照“平面分单元、纵向分小层”的思路,采用容积法对储量进行复算。此外,依据累计产气量、储量丰度及内部收益率对储量进行综合分类评价。复算结果表明,含气面积和储量丰度的减小引起复算储量减少,含气面积减小是储量减少的主要原因;稀井网砂体边界控制产生的误差、井间砂体减薄尖灭及储层的非均质变化共同引起含气面积的减小。评价结果证实区块储量物质基础落实,具备较长期稳产的资源基础。
 

关键词: 致密砂岩气藏, 地质知识库, 储量复算, 分类评价

Abstract:

It is a typical tight sand gas reservoir with strong heterogeneous in Sulige Gasfield,Ordos Basin.The proved reserve,which has been calculated with volumetric method,is inaccurate due to the limited data.In this paper,with strongly inhomogeneous tight sandstone gas reservoir in He8 and Shan1 member of Su 14 block in Sulige Gasfield as the study objective,we put forward the method of recalculating reserves confined by database of geological knowledge about reservoir.Based on geological knowledge database established by analyzing reservoir architecture of wells in infill drilling pilot,we described the geometry and boundary of effective reservoir sand body.According to the thought “dividing the reservoir into units horizontally and minor layers vertically”,the reserves were recalculated with volumetric method.In addition,the reserves were classified and evaluated synthetically according to the cumulative output of gas well,reserves abundance and internal rate of return (IRR).The result shows that the recalculated reserves reduced due to the decrease of gas bearing area and the abundance of reserves.The decrease of gas bearing area,which was caused by the sand body thinning to cutting up,the errors due to the incomplete well pattern and the inhomogeneous of reservoir,is a main reason for reserves reduction.The recalculation and evaluation show that the material base of reserve in the study area is solid,and it can maintain stable production for a long time.
 

Key words: Tight sandstone gas reservoir')">

中图分类号: 

  • TE122.1

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