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塔里木盆地大北地区中生界白垩系巴什基奇克组属于超深高压气藏,普遍为高压、低孔隙度、低渗透率、裂缝型砂岩储集层,因地质条件及钻井工艺等因素的影响,给气层的解释评价带来了难度。通过对该地区22口井的试油资料与30层气测烃类气体组分及派生参数归纳分析,提出将气测烃类气体组分及派生参数合称为气测数据体,对气测数据体在气层的表现特征及其规律性进行了总结,针对统计分析中个别井气测数据体与试油结论不符的问题,提出了非标准气测数据体的概念;采用全烃与甲烷比值划分法,根据该比值的大小,将相应段气测数据体划分为非标准气测数据体和标准气测数据体,剔除非标准气测数据后建立的大北地区白垩系气测标准图板及气层解释标准,结果表明,该图板及标准应用更为符合实际。在现场解释评价的验证中,收到很好的效果,为指导该地区气层现场解释评价奠定了基础。
The Mesozoic Cretaceous Bashijiqike Formation in the Dabei area of the Tarim Basin belongs to ultra-deep high pressure gas reservoirs, and is generally high-pressure, low porosity, low permeability and fractured sandstone reservoirs. Due to geological conditions and drilling technology, The impact of the interpretation of the gas layer to bring the degree of difficulty. Based on the analysis of the test oil data of the 22 wells in the area and the hydrocarbon gas components and derived parameters of the 30th gas, it is proposed that the hydrocarbon gas components and derived parameters of the gas are collectively referred to as the gas measurement data body, In the light of the problem that the data of individual gas measuring dataset does not accord with the conclusion of the test oil in the statistical analysis, the concept of non-standard gas measuring dataset is put forward. The whole hydrocarbon and methane Ratio division method, according to the size of the ratio, the corresponding section of gas measurement data body is divided into non-standard gas measurement data body and standard gas measurement data body, excluding non-standard gas data after the establishment of the Dabei area of Cretaceous gas measurement standards Board and gas layer interpretation of the standard, the results show that the board and standard applications more in line with reality. In the on-site interpretation and evaluation of the verification, received good results, to guide the interpretation of the gas field in the area to lay the foundation for evaluation.