致密砂岩气藏储量计算方法探讨——以容积法计算SX区块储量为例

刘占良, 崔明明, 樊爱萍, 路中奇

doi:10.11764/j.issn.1672-1926.2014.12.1983

天然气地球科学 >

2014 , Vol. 25 >Issue 12: 1983 - 1993

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.12.1983

天然气地质学

致密砂岩气藏储量计算方法探讨——以容积法计算SX区块储量为例

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1.中国石油股份公司长庆油田公司第五采气厂，陕西西安 710018；
2.山东省沉积成矿作用与沉积矿产重点实验室,山东科技大学地质学院,山东青岛 266590；
3.中国石油长庆油田分公司,陕西西安 710021

刘占良(1964-)，男，陕西长安人，高级工程师，主要从事油气田勘探开发研究与管理工作.E-mail:Lzl_ cq@petrochina.com.cn.

收稿日期: 2014-01-13

修回日期: 2014-04-08

网络出版日期: 2019-09-18

基金资助

国家自然科学基金（编号：41402120)|国家科技重大专项“中西部重点碎屑岩领域油气富集规律与分布预测”（编号：2011ZX05002-006)|山东科技大学科研创新团队计划(编号：2010KYTD103)联合资助.

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Calculation Method Discussion of Tight Sandstone Gas Reserves：A Case of Volumetric Method in SX Block

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1.No.5 Gas Production Plant,Changqing Oilfield Company,PetroChina,Xi′an 710018,China;
2.Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals,College of
Geological Sciences and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;
3.Changqing Oilfield Company,CNPC,Xi′an 710021,China

Received date: 2014-01-13

Revised date: 2014-04-08

Online published: 2019-09-18

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摘要

鄂尔多斯盆地苏里格气田属致密砂岩气藏，其低孔低渗、强非均质性的特点决定了其常规储量计算方法的难度，而致密砂岩气藏储量计算方法的探讨对于气藏的合理开发利用具有重要意义。以SX区块为例，探讨了利用容积法进行储量计算的过程和应注意的问题，并形成一套完整的计算体系。容积法的具体计算方法和步骤如下：①综合测井及解释数据、地震、岩心等资料，分别运用分布函数曲线法、经验统计法、测试法、拟合公式等方法求取了盒8段、山1段的孔渗、含气饱和度下限值|②利用钻井与试气数据，参考地震预测成果，结合砂体展布划定含气区域|③在确定物性下限的基础上，结合“四性”标准划分有效储层，求取有效厚度|④利用气层中温和中压，求取对比温压，得到偏差因子并最终求取气藏储量。研究区储集层的物性和含气区域等因子受沉积和成岩作用的影响，辫状河三角洲沉积体系发育良好的有效砂体展布，河道砂体在沉积过程中可反复迁移，多期叠置，厚度大，分布面积广。压实作用、胶结作用抑制了孔隙发育，降低储层物性，溶蚀作用、压裂作用极大地改善了储层孔渗，对储层油气储集和运移影响较大。

关键词： 鄂尔多斯盆地; 苏里格气田; 致密砂岩; 储量计算; 物性下限; 有效储层

本文引用格式

刘占良, 崔明明, 樊爱萍, 路中奇 . 致密砂岩气藏储量计算方法探讨——以容积法计算SX区块储量为例[J]. 天然气地球科学, 2014 , 25(12) : 1983 -1993 . DOI: 10.11764/j.issn.1672-1926.2014.12.1983

Abstract

The Sulige Gasfiled in Ordos Basin is a tight sand gas reservoir,and its low porosity,low permeability,and strong heterogeneity increased difficulty of the other calculating methods.Research on the calculation method of tight gas reservoir is of great significance for the rational development of gas reservoir.Here is the volumetric method of tight gas reserve:(1)Based on geological interpretation of logging data,seismic data,core analysis,distribution function curve,experience statistics act and other methods were used to determine the lower limit of porosity and permeability in He8 and Shan1 Formations|(2)Sandbody controlled the reserve area,drilling data and seismic analysis predicted its distribution|(3)Lower limits and four properties standard determined the effective reserve and its thickness|(4) The center temperature and pressure data were used to calculate gas deviation factor and finally the geological reserves were obtained.The reservoir property and gas-bearing area were affected by the deposition and digenesis.The braided river delta develops a set of good reservoir,repeated and overlay migration make a thick-wide distributed sand body.Compaction and cementation inhibit porosity evolution,leading to a lower reservoir properties.Dissolution and fracturing greatly improve reservoir properties and make an impaction to the store and transport of oil and gas.

Key words： Ordos Basin; Sulige Gasfield; Tight gas sandstone; Reserve calculation; Petro physical parameter cutoff; Effective reservoir

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