A fine assessment technology for medium-high exploration degree plays

Abstract

The current evaluation methods mainly focus on plays without hydrocarbon discoveries. By integrating three techniques, i.e., spatial quantitative prediction technology of hydrocarbon bearing probability, overlapping processing technology for multi-layer spatial hydrocarbon bearing probability, petroleum resources abundance fractal simulation restricted by corresponding spatial hydrocarbon bearing probability, a new fine evaluation method was put forward. This method, based on spatial grids and combining planar and vertical evaluation results, focuses on the assessment of multi-layer plays. Compared with the present methods, it has advantages such as comprehensive assessment, precise processing results, comprehensive data collection and application, exploration effectiveness. By this Method, 38 secondary structural belts in the middle-upper exploration formations in the Turpan-Hami Basin were evaluated. Favorable drilling areas in each belts were pointed out based on the spatial probability of hydrocarbon bearing. Their corresponding geological favorability index and residual oil resources revealed that the Shengbei, Huoyanshan, Lukeqin, Shanle Structural Belts are the most favorable belts for exploration. 摘 要: 现行的区带评价方法主要针对尚无油气发现的区带，在剖析其局限性的基础上，将含油气概率空间定量预测技术、多层系空间含油气概率叠合处理技术、含油气概率约束下的油气资源丰度空间定量模拟技术紧密结合，提出一种平面与纵向相结合、基于空间网格的多层系区带精细评价新方法。相对于现行的区带评价方法，具有评价综合性、评价及评价结果精细性、资料应用与信息采集全面性、应用实效性等优点。采用该方法对吐哈盆地中上部层系38个二级构造带进行评价，根据空间含油气概率评价结果，明确了各构造带内部有利钻探区；依据各区带地质评价值、待发现资源量评价值进行二因素综合排队优选，指出胜北、火焰山、鲁克沁、鄯勒等构造带是下步勘探的最有利构造带。图6表1参25 Key words: play, spatial probability of hydrocarbon bearing, spatial resources abundance, multi-layer overlapping process, Turpan-Hami Basin, favorable secondary structural belts