PetroChina Huabei Oilfield Company School of Energy Resources,China University of Geosciences(Beijing) Yanzhou Coal Mining Company Limited

为探索煤储层纵向非均质性对煤层气开发选区的影响,以郑庄区块为例,基于煤心、测试及测井资料,采用参差系数及重标极差分析方法,研究了煤储层非均质性发育的地质控制规律。结果表明,煤储层含气量的非均质性特点为:纵向上,整体较弱且具有同一煤层内顶底弱、中部强的特点;平面上,在构造相对简单地区很弱,而在靠近断层或横跨断层地区较强,变化不具规律性。煤储层裂缝发育的非均质特点为:在中部中等断层发育带、东部大断层发育带储层裂缝密度参差系数、分形维数普遍较大,储层非均质性强。综合预测结果表明,郑庄区块中部Z66井—Z58井—Z27井控制的环形区带和东部沿大断层走向的条带区煤储层纵向非均质性较强,不利于煤层气的开发。

in order to discover the longitudinal heterogeneity of the cal reservoir and its lnfluence on to the development selected block of thecalbed methane,based on Zhengzhuang Block as an example and based on the coal core,measurement and logging information,the parametererror coefficient and RIS analysis method were applied to the study on the geological control law of the coal reservoir heterogeneity development.The results showed that the heterogeneity features of the coalbed methane gas content were generally weak in longitudinal and would have thefeatures of weak on roof and strong in middle part within a same seam. On the plane,the structure relative simple area would be very weak,the area closed to the fault or lateral crossed fault would be strong and the variation would not be in a law.T'he heterogeneity features of the crack development in the coal reservoir would be high parameter eror coefficient and fractal dimension of the crack density in the resevoirs at medium fault development zone at the middle part and the large fault development zone at the east part and the heterogeneity ofthe reservoit were strongThe comprehensive predicted results showed that in the wells of Z66—Z58—Z27 controlled annula zone at the cental of Zhengzhuang Block ndthe strip zone along the large strike at the east part,the longitudinal heterogeneity of the coal reservoir would be strong and would not be favorable to the development of the coalbed methane.

国家自然科学基金资助项目(41472137)；中国石油天然气股份有限公司重大科技专项资助项目(2013E-2205)；山西省煤基重点科技攻关资助项目(MQ201-01)；