火成岩储层物性参数模型及油层判识——以准噶尔盆地车排子凸起石炭系为例

准噶尔盆地车排子凸起石炭系发育火成岩油藏，但其储层岩性和物性特征十分复杂。运用岩性鉴定、岩心实测、成像测井、常规测井和试油测试等资料，总结出该区石炭系火成岩孔隙-裂缝储集空间组合特点与规律，即总孔隙度为基质孔隙度和裂缝孔隙度之和，总渗透率为基质渗透率和裂缝渗透率之和，对于裂缝不发育的储层总渗透率近似为基质渗透率。以岩心实测为约束，运用三孔隙度曲线多元回归和FMI成像测井识别有效裂缝等方法，分别建立了基质、裂缝和总体的储层参数测井解释模型。与实测储层物性对比验证，模型合理，为车排子凸起火成岩储层物性评价提供新手段，对其它地区火成岩油藏储层评价提供了借鉴。以储层参数测井解释模型为基础，结合多项钻井、录井和试油资料，建立了车排子地区石炭系火成岩油藏油层判识标准。

Investigation of igneous rock reservoir petrophysical parameter model and oil reservoir identification standard: A case study on the Carboniferous samples of the Chepaizi Uplift in the Junggar Basin

Igneous rock oil reservoir distributed in the Carboniferous system of Chepaizi uplift in the Junggar Basin, but its reservoir lithology and petrophysical characteristics is very complex.Firstly, taking method of petrology, lithology identification, core measurement, oil testing, imaging and conventional logging, the pore and fracture characteristics of the igneous rock reservoir were summarized.The total petrophysical property is the matrix porosity, permeability and porosity.The total permeability of the reservoir is contributed by both fracture permeability and matrix permeability, while the permeability of un-fractured reservoir roughly equals matrix permeability.Secondly, using tri-porosity curve regression and FMI effective fracture identification with the constraints from core measurement, a model have been established to calculate the physical parameters of matrix, fracture and bulk reservoir of the igneous rock.Data is compared with core measurements.The model is proved to be reasonable and practical when applied to igneous rock reservoir physical property evaluation in the Chepaizi Uplift.This method can also be used to evaluate other areas.At last, based on the model of reservoir physical parameter, together with analysis on drilling, mud logging and oil testing data, a standard for igneous rock oil reservoir diagnose in the Chepaizi Uplift has been established.