煤储层地质建模思路与方法——以鄂尔多斯盆地东南缘韩城矿区为例

doi:10.11743/ogg20180318

石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (3): 601-610.doi: 10.11743/ogg20180318

煤储层地质建模思路与方法——以鄂尔多斯盆地东南缘韩城矿区为例

马平华¹, 邵先杰¹, 霍梦颖¹, 褚庆忠¹, 霍春亮², 梁武斌¹

1. 燕山大学石油工程系, 河北秦皇岛 066004;
2. 中海石油有限公司天津分公司, 天津 300452

收稿日期:2016-05-19 修回日期:2018-03-26 出版日期:2018-06-28 发布日期:2018-06-21
通讯作者: 褚庆忠(1974-),男,博士、副教授,油藏描述与油气田开发。E-mail:qzhchu@ysu.edu.cn。 E-mail:qzhchu@ysu.edu.cn
第一作者简介:马平华(1983-),男,博士、讲师,油气田开发。E-mail:mapinghua@ysu.edu.cn。
基金项目:
国家科技重大专项（2011ZX05038-001）；河北省自然科学基金资助项目（D2016203253）。

Concepts and methods for coalbed geology modeling: A case study in the Hancheng mining area,Southeastern margin of Ordos Basin

Ma Pinghua¹, Shao Xianjie¹, Huo Mengying¹, Chu Qingzhong¹, Huo Chunliang², Liang Wubin¹

1. Department of Petroleum Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China;
2. Tianjing Branch of CNOOC Ltd., Tianjing 300452, China

Received:2016-05-19 Revised:2018-03-26 Online:2018-06-28 Published:2018-06-21

摘要/Abstract

摘要： 由于煤岩样易碎，很难通过室内实验获得煤层真实的渗透率；煤岩弹性模量低，泊松比高，对应力十分敏感，地面条件下实验的渗透率不能反映地下的情况；常用的测井物性解释方法在煤层渗透率解释中很难应用。这些因素导致煤储层地质建模不能照搬常规砂岩油气藏的方法。依据试井确定渗透率，并通过渗透率影响因素的分析，分煤岩类型建立了渗透率与地应力的定量关系。提出了四步建模法：首先建立煤储层空间格架模型，然后建立煤岩相（类型）模型和地应力模型，在三者的约束下，通过井点试井渗透率和地应力井点计算渗透率的控制，采用随机模拟技术完成渗透率模型的建立。通过矿场实际数据的检验，模型与生产状况吻合比较好，证明该建模思路与方法在实际应用中可行。

关键词: 煤岩类型, 地应力场, 地质建模, 渗透率, 煤储层, 韩城矿区, 鄂尔多斯盆地东南缘

Abstract: The way of coalbed geology modeling is quite different from that of modeling conventional sandstone oil/gas reservoirs due to the following factors.(1)It is difficult to obtain the actual permeability of coalbed through laboratory experiment because the coal rock sample is brittle;(2)the permeability derived through laboratory experiments cannot reveal the subsurface conditions,since the coal rock is low in elastic modulus,high in poisson's ratio,and thus it is sensitive to stress;(3)it is difficult to apply the methods of well log petrophysical interpretation to interpret coalbed permeability.Thus in this study,we determine the permeability via well testing data,and establish a quantitative relationship between in-situ stress and permeability according to the types of coalbed,based on the analysis of all critical factors for permeability.In addition,we propose a 4-step modeling,namely,to set up the model of coal reservoir space framework,the coal facies(type)model,and the in-situ stress model.Then,under these 3 constraints,the model of permeability is established with stochastic simulation technique and the controlling points from the permeability obtained from well test and well in-situ calculation.Further,the model fits well with the production data status quo from the actual coal data of bed methane fields,which proves the feasibility of the concepts and methods in practical application.

Key words: coal rock type, in-situ stress field, geology modeling, permeability, coalbed, Hancheng mining area, southeastern margin of Ordos Basin

中图分类号:

TE122.2

马平华,邵先杰,霍梦颖,等. 煤储层地质建模思路与方法——以鄂尔多斯盆地东南缘韩城矿区为例[J]. 石油与天然气地质, 2018, 39(3): 601-610. doi: 10.11743/ogg20180318 Ma Pinghua,Shao Xianjie,Huo Mengying,et al. Concepts and methods for coalbed geology modeling: A case study in the Hancheng mining area,Southeastern margin of Ordos Basin[J]. Oil & Gas Geology, 2018, 39(3): 601-610. doi: 10.11743/ogg20180318

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煤储层地质建模思路与方法——以鄂尔多斯盆地东南缘韩城矿区为例

Concepts and methods for coalbed geology modeling: A case study in the Hancheng mining area,Southeastern margin of Ordos Basin

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