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松达煤田位于巴基斯坦伊斯兰共和国信德省塔塔区(Thatta district,Sindh province,Pakistan),地层自老至新由由侏罗系Chiltan组,古新统Bara组、Lakhra组,始新统Laki组和第四系组成。通过对松达煤田煤岩层测井物性参数的统计和曲线形态的分析,总结出该区煤岩层测井曲线独有的物性特征。根据密度、三侧向电阻率、自然伽马、声波等测井曲线在煤层、灰岩、砂岩、泥岩、细砂岩等岩性上的组合特征,进行了岩煤层的对比。全井田自上而下共解释分煤层组11个与灰岩层组3个,其中对6个较发育煤层进行了详细的说明。
The Songda Coalfield is located in Thatta district, Sindh province, Pakistan. The strata have been formed from the Jurassic Chiltan Formation, the Paleocene Bara Formation, the Lakhra Formation, the Eocene Laki Formation, Quaternary composition. Based on the statistic and curve shape analysis of petrophysical logging parameters in Songda Coalfield, the physical characteristics of the logging curve of coalbed rock formation in this area are summarized. According to the combination features of density, triaxial resistivity, natural gamma ray and acoustic logging curves in lithology such as coal seam, limestone, sandstone, mudstone and fine sandstone, the contrast of rock and coal seam is carried out. The whole field explained a total of 11 sub-seam groups and 3 limestone formations from top to bottom, of which 6 more developed seam layers were described in detail.