古潜山油藏缝洞型储层测井评价技术的应用

APPLICATION OF WELL-LOGGING EVALUATION OF FRACTURED-VUGGY RESERVOIR IN PALAEO-BURIAL-HILL RESERVOIR

某油田古潜山储层主要是隐藻白云岩,发育大量裂缝、溶洞,非均质性较强,物性差,具有低孔低渗的特点,属于典型的碳酸盐岩潜山缝洞型储层。研究区缺少FMI成像测井和地层倾角测井资料,所以本文选择以双侧向为主的常规测井技术来识别缝、洞,充分利用常规测井资料建立了储层参数测井解释模型,进一步计算了工区内近50口井的相关储层参数,从而定量地划分、评价了储层。测井解释结果与实际地质情况基本一致,说明文中应用的测井评价技术,完全适用于该油田古潜山储层的测井识别与评价。

Palaeo-burial-hill reservoir in an oilfield is mainly composed of cryptalgal dolomite.And this reservoir developed with large fractures and vugs is characterized by high heterogeneous,poor physical properties,low permeability and low porosity.It is typical carbonate burial-hill fractured-vuggy reservoir.In this study,we use a conventional technique with dual laterolog as the soul to distinguish fratures and vugs in the reservoir due to a short of data obtained from FMI and stratigraphic dip well logging in this studied area.Furthermore,a well-loging interpretation model with reservoir parameters is established by means of these conventional well-logging data.Some relevant reservoir parameters in about 50 wells of the studies area have been further measured to quantitatively classify and assess the reservoir.The results which were obtained from well-logging interpretation and geologic analysis are roughly consistent.It indicates that the well-logging technique is totally applied to well-logging distinguish and assessment in palaeo-burial-hill reservoir of this oilfield.