煤储层裂隙发育规律的构造动力学评价预测方法

Evaluation and prediction method of tectonodynamics in fracture development law of coal reservoir

为了探讨煤储层裂隙发育规律,建立了裂隙发育规律的构造动力学评价方法与技术流程。依据相同构造背景下煤储层与岩层裂隙发育规律具有成因联系的基本思路,通过野外煤层和岩层大量节理数据测量与分析,揭示了不同岩层(煤层)岩性节理发育的差异性及其内在联系,建立了煤储层裂隙发育预测模型,并对鄂东大宁-吉县区块5号煤储层裂隙发育非均质性及其分布规律进行了预测与评价,进而探讨了煤储层裂隙发育非均质性对渗透率的影响。研究结果表明,构造动力学是煤储层裂隙发育规律预测与评价的有效方法,为煤储层裂隙预测评价探索了新的途径。

In order to discuss the fracture development law of the coal reservoir,a tectonodynamics evaluation method and technical process of the fracture development law were set up.Based on a basic idea there was a genetic relationship between coalbed methane and rock fracture development under the same tectonic background,with the measurement and analysis on the great joint data of the site seam and rock strata,the differences and inherent relations of the lithology joint developments in different rock strata were revealed.The fracture development prediction model of the coal reservoir was set up.The prediction and evaluation were conducted on the fracture development inhomogeneity and the distribution law of No.5 coal reservoir in Edong Daning-Jixian Block and the fracture development inhomogeneity affected to the permeability was discussed.The study results showed that the tectonodynamics was an effective method to the prediction and evaluation of the fracture development in the coal reservoir.