四川盆地海相碳酸盐岩天然气资源量储量转换规律  

Rules on conversion of natural-gas reserves to resources in marine carbonate rocks,Sichuan Basin

作　　者：战薇芸[1] 刘辉[1] 陈尘[1] 李海涛[1] 吴雪峰[1] 未勇 Zhan Weiyun;Liu Hui;Chen Chen;Li Haitao;Wu Xuefeng;Wei Yong(Exploration and Development Research Institute,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610041,China;PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610051,China)

机构地区：[1]中国石油西南油气田公司勘探开发研究院 [2]中国石油西南油气田公司

出　　处：《天然气勘探与开发》2020年第4期48-53,共6页Natural Gas Exploration and Development

基　　金：中国石油西南油气田公司科学研究与技术项目"四川盆地天然气发展战略—资源储量产量转化规律及增长趋势预测研究"(编号:20190310-03)。

摘　　要：分析油气资源潜力、预测新增探明储量规模是合理编制储量、产量规划方案、制定中长期发展战略的基础。根据资源量、储量转换规律可以进一步评价、落实资源升级潜力。通过研究已升级气藏储量转换规律,分析各项储量计算参数与储量在升级转换中的相关性,明确影响储量升级转换的关键因素并计算转换率。根据已发现圈闭,利用圈闭钻探成功率、储量计算参数升级转换率测算资源量、储量升级转换率,最终预测新增探明储量规模。该方法以资源量、储量升级规律为依据,以目前勘探发现为基础,可以较为精确地预测新增储量规模。研究结果表明:①含气面积是引起储量升级变化的最关键因素,其次是有效储层厚度、有效孔隙度、含气饱和度等参数;②储量升级中,构造气藏含气面积变化最小,岩性气藏含气面积变化最大,储量丰度变化相对较小;③四川盆地海相碳酸盐岩从资源量到预测储量转换率43%左右,三级储量转换率介于60%~75%;④根据资源量、储量升级转换率,以可升级圈闭为基础,预测四川盆地海相碳酸盐岩可新增探明储量约1.8×1012 m3。Both analyzing oil and gas resource potential and predicting additional proven reserves are the foundation to reasonably compile reserve and production plans and formulate middle-and long-term development strategies.The upgrading potential of oil and gas resources can be evaluated and confirmed further according to conversion rules on resources and reserves.Based on an investigation on these rules of upgraded gas reservoirs,the correlation of upgrading conversion between reserve calculation parameters and reserves was analyzed.Then,the key factors affecting this conversion were clarified,and the conversion rate was calculated.The resource and reserve upgrading conversation rate was calculated according to discovered traps,combined with the success rate of trap drilling and the upgrading conversion rate of reserve calculation parameters,and eventually the additional proved reserves were predicted.With resource and reserve upgrading rules as the basis and the current exploration discoveries as the foundation,the above ways can predict the additional reserves more accurately.Results show that,(1)gas-bearing area is the most important factor affecting reserve upgrading,followed by effective reservoir thickness,porosity,and gas saturation;(2)for reserve upgrading,the gas-bearing area variation of structural reservoirs is the smallest and that of lithologic ones is the largest.And the reserve abundance varies less;(3)the conversion rate of predicted reserves from the resources in marine carbonate rocks of Sichuan Basin is about 43%,and the conversion rate of 3P reserves ranges from 60%to 75%;and(4)based on the upgradable traps,it is predicted according to the resource and the reserve upgrading conversion rate that the additional proved reserves in these carbonate rocks is about 1.8×1012 m3.

关 键 词：四川盆地 海相碳酸盐岩 资源潜力 转换规律 储量参数 储量升级转换率 新增储量预测 

分 类 号：P618.13[天文地球—矿床学]