一种新型地层裂缝分布规律模型及其应用

A Novel Model for Analyzing the Fracture Distribution and Its Application

张海山 罗勇 邓金根 段飞飞 胡连波 袁俊亮

ZHANG Haishan LUO Yong DENG Jingeng DUAN Feifei HU Lianbo YUAN Junliang

中海石油(中国)有限公司上海分公司, 上海 200030; 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249

Shanghai Branch of CNOOC Ltd., Shanghai 200030, China; State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China

地层中的裂缝垂向分布在石油工程中有重要的作用。然而,对地层裂缝分布可以较为准确反映的成像测井因为其高昂的费用并不能成为研究地层裂缝分布的主要手段。因此建立起基于常规测井数据分析裂缝垂向分布的模型有很大的实际意义。利用模糊数学理论并综合考虑了多种对地层裂缝有响应的测井参数,建立了一种新型裂缝指数分布规律的计算模型。该模型的计算结果和地层的成像测井比较,发现该模型能较为准确地反映地层裂缝的分布情况。现场应用证明该模型是一个简单但是非常有效的分析地层裂缝分布的模型。

The fracture distribution in formation in vertical direction plays an important role in petroleum engineering. However, the imaging logging which reveals the fracture distribution precisely can not be wildly used due to its highly cost. Therefore, it is very meaningful to establish a model which can analyze the fracture distribution based on conventional logging data. By combining fuzzy mathematics with conventional logging parameters which have response to the existence of fractures in formation, a novel calculation model of the fracture index has been established. Comparing the calculation result of established model with field imagining logging data, it is found that the new model can reveal the formation fracture distribution accurately. The Field application results indicated that the new model is a simple but very effective model to analyze the fracture distribution in formation.

https://doi.org/10.3969/j.issn.1008-2336.2015.04.045