东濮凹陷泥页岩油气层录井评价方法

Mud logging evaluation on mud shale reservoir in Dongpu depression

东濮凹陷泥页岩油气显示丰富,正在成为主要的油气接替领域.亟需研究录井评价技术方法为该区泥页岩油气层评价提供依据。为此.通过东濮凹陷泥页岩油气录井、测井响应特征和分布规律的研究,优选岩石热解、综合录井和X射线荧光元素录井以及测井响应特征参数,重点对泥页岩储集性和含油气性进行分析.建立了录井和测井一录井泥页岩有效储集层和油气层评价方法及标准。测井一录井油气层解释评价方法综合考虑了地质因素,对泥页岩油气层识别效果更理想。文西构造带、濮卫环洼带、文东斜坡带16口井中现场实际应用情况表明.老井、新井油气层解释符合率达到85.6%。认为泥页岩油气层的岩石热解、气测、X射线荧光元素录井参数具有较好的响应特征,能实现油气层的有效识别与评价。在缺乏脆性矿物资料的情况下。结合反映储集体特征的厚度因子和反映地层特征的测井参数.将会使泥页岩油气层解释符合率得到较大的提高。

Dongpu depression is rich in oil and gas shows of mud shale,and becoming a major oil and gas replacing field,which needs urgent research on mud logging evaluation method to provide a basis for mud shale reservoir evaluation in this area.Therefor mud shale effective reservoir and hydrocarbon reservoir evaluation methods and criteria were established for mud logging and well logging-mud logging through studying mud logging and well logging response characteristics and distribution for mud shale oil and gas in Dongpu depression,optimizing response characteristic parameters from rock pyrolysis,comprehensive mud logging and X-ray fluorescence chromatogram logging and well logging and focusing on analyzing mud shale reservoir properties and hydrocarbon potential.Well logging- mud logging reservoir interpretation and evaluation methods also combined with geological factors,the effects of identifying mud shale reservoirs were more ideal.The coincidence rate was 85.6%for interpreting hydrocarbon reservoirs of 16 old and new wells in Wenxi structural zone,Puwei loop low lying strip and Wendong slope.The parameters of rock pyrolysis,gas logging,X-ray fluorescence chromatogram logging have better response characteristics for mud shale reservoirs,and realize effective identification and evaluation of hydrocarbon reservoirs.In the absence of brittle minerals,the coincidence rate of interpreting mud shale reservoirs will be greatly improved by combining with thickness factor that reflects reservoir characteristics and well logging parameters that reflect formation characteristics.