对标产能的碳酸盐岩储集层测井分类评价——以塔里木盆地托甫台地区一间房组为例

doi:10.7657/XJPG20230116

摘要/Abstract

摘要：

孔隙类型多样是塔里木盆地托甫台地区中奥陶统一间房组碳酸盐岩储集层非均质性强的主要原因，储集层有效性难以评价。在岩心和薄片观察的基础上，依据成像测井资料，将碳酸盐岩孔洞分为溶蚀孔和洞穴；裂缝分为构造缝、溶蚀缝和压溶缝。根据孔洞和裂缝的组合形式，将研究区一间房组碳酸盐岩储集层划分为裂缝型、裂缝-孔洞型和孔洞型。综合导电效率、裂缝孔隙度和深侧向电阻率变化幅度，建立了储集层类型的定量划分标准，孔洞型储集层导电效率小于0.008，裂缝孔隙度小于0.13%；裂缝-孔洞型储集层导电效率为0.008~0.024，裂缝孔隙度为0.13%~0.60%；裂缝型储集层导电效率大于0.024，裂缝孔隙度大于0.60%。依据累计有效孔隙厚度、平均有效孔隙度以及产能，建立了裂缝-孔洞型储集层和孔洞型储集层分类判别图版。托甫台地区一间房组裂缝-孔洞型储集层和孔洞型储集层均主要为Ⅱ类储集层，测试日产液量分别超过55 t和50 t。

关键词: 塔里木盆地, 托甫台地区, 一间房组, 碳酸盐岩储集层, 测井, 分类评价, 产能, 缝洞

Abstract:

The diversity of pore types is the main cause for strong heterogeneity of the carbonate reservoirs in the Yijianfang formation in Tuofutai area of Tarim basin, making it challenging to evaluate the reservoir effectiveness. On the basis of core and thin section observations, and according to the imaging logging data, the vugs in the carbonate rock are divided into dissolved vug and cavity, and the fractures are divided into structural fracture, dissolution fracture and pressolution fracture. According to the pattern of vug-fracture association, the pore spaces of the Yijianfang formation carbonate reservoirs in the study area are classified as fracture, fracture-vug and vug. The quantitative classification criteria for the reservoirs were established by combining electrical conductivity, fracture porosity and deep lateral resistivity variation. To be specific, the reservoir with the electrical conductivity less than 0.008 and the fracture porosity less than 0.13% is considered as vuggy reservoir; the reservoir with the electrical conductivity ranging from 0.008 to 0.024 and the fracture porosity of 0.13%-0.60% is considered as fractured-vuggy reservoir; and the reservoir with the electrical conductivity greater than 0.024 and the fracture porosity higher than 0.60% is regarded as fractured reservoir. According to the cumulative effective pore thickness, average effective porosity and productivity, the classification and discrimination charts for fractured-vuggy type reservoirs and vug type reservoirs were established. The vuggy and fractured-vuggy reservoirs in the Yijianfang formation in Tuofutai area are mainly Category Ⅱ reservoirs, with the daily liquid production of more than 50 t and 55 t, respectively.

Key words: Tarim basin, Tuofutai area, Yijianfang formation, carbonate reservoir, well logging, classified evaluation, productivity, fracture-vug

中图分类号:

TE122
P631

唐军, 何泽, 申威, 齐戈为, 郭为民. 对标产能的碳酸盐岩储集层测井分类评价——以塔里木盆地托甫台地区一间房组为例[J]. 新疆石油地质, 2023, 44(1): 112-118.

TANG Jun, HE Ze, SHEN Wei, QI Gewei, GUO Weimin. Productivity-Based Classified Logging Evaluation of Carbonate Reservoirs: A Case Study on Yijianfang Formation in Tuofutai Area, Tarim Basin[J]. Xinjiang Petroleum Geology, 2023, 44(1): 112-118.

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