Analysis of genesis of low resistivity reservoirs and method of fluid identification in Fushan Sag

被引：0

作者：

Wei B. ^{[1
,2
]}

Xie R. ^{[1
]}

Zhao J. ^{[2
]}

Zhang C. ^{[2
]}

Fang C. ^{[2
]}

Wei Y. ^{[3
]}

Xia Y. ^{[2
]}

机构：

[1] College of Geophysics in China University of Petroleum(Beijing), Beijing

[2] China Petroleum Logging Comapany Limited, Xi'an

[3] Bureau of Geophysical Prospecting INC, China National Petroleum Corporation, Daqing Geophysical Second Company, Songyuan

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2024年 / 48卷 / 02期

关键词：

comprehensive reservoir index; fluid recognition; Fushan Sag; invasive factor; low-resistivity reservoirs;

D O I：

10.3969/j.issn.1673-5005.2024.02.006

中图分类号：

学科分类号：

摘要：

Low-resistivity reservoirs have been extensively developed in Weizhou Formation of Fushan Oilfield. The unclear understanding of the mechanisms behind the formation of low-resistivity reservoirs and the accurate identification of reservoir fluids pose significant challenges to the efficient exploration and development of Weizhou Formation. In this study, the Huachang, Bailian and Yong̍an areas are selected as research targets. We comprehensively analyze data from rock physics experiments, formation water, well logging, and oil testing to investigatefive factors:formation water salinity, light cement slurry intrusion, irreducible water saturation, additional conductivity of clay, and oil saturation. By identifying the main controlling factors of low resistance in different areas, we deeply analyze the petrophysical and logging response characteristics of different genetic mechanisms and construct fluid-sensitive logging evaluation parameters such as comprehensive reservoir index, invasion factor,and resistance increase rate. Combining logging interpretation and production testing,we establish corresponding fluid identification charts and apply them to 58 test horizons in 27 wells in Weizhou Formation. The results demonstrate that the coincidence rate of fluid identification increases from 76% to 84%, effectively enhancing the accuracy of fluid identification in the low-resistance reservoirs of Weizhou Formation. © 2024 University of Petroleum, China. All rights reserved.

引用

页码：57 / 66

页数：9

共 20 条

[1] PAULF W., Recognition and evaluation of low-resistivity pay[J], Petroleum Geoscience, 6, 1, pp. 77-92, (2000)
[2] ARCHIE G E., The electrical resistivity log as an aid in determining some reservoir characteristics[J], Transactions of the Aime, 146, 1, pp. 54-62, (1942)
[3] SIMANDOUX P., Dielectric measurements on porous media, application to the measurements of water saturation: study of behavior of argillaceous formations[J], Revue de L̍institut Francais du Petrole, 18, pp. 193-215, (1963)
[4] POUPON A, LEVEAUX J., Evaluation of water saturation in shaly formations [ C / OL ], SPWLA 12th Annual Logging Symposium, (1971)
[5] WAXMAN M H, Electricalconductivities in oil-bearing shaly sands[J], Soc Petr Eng J, 8, 8, pp. 107-122, (1968)
[6] WAXMAN M H, THOMAS E C., Electrical conductivities in Shaly Sands-I. The relation between hydrocarbon saturation and resistivity index
[7] II. The temperature coefficient of electrical conductivity, (1972)
[8] CLAVIER C, HEIM A, SCALA C., Effect of pyrite on resistivity and other logging measurements[ C / OL], SPWLA 17th Annual Logging Symposium, (1976)
[9] MASHABA V, ALTERMANN W., Calculation of water saturation in low resistivity gas reservoirs and pay-zones of the Cretaceous Grudja Formation, onshore Mozambique basin[J], Marine and Petroleum Geology, 67, pp. 249-261, (2015)
[10] AMELIO T W, MAT I M S, ANGELIA H A, Et al., Low resistivity pay evaluation, case study: thin bed sand-shale lamination reservoirs, Peninsula, Malay Basin, International Petroleum Technology Conference, (2016)

← 1 2 →