Characteristics and Connectivity of Fault-Controlled Fractured-Vuggy Reservoirs: A Case Study of Unit T in Tuofutai Area, Tahe Oilfield

doi:10.7657/XJPG20220509

Abstract

Abstract:

Fault-controlled fractured-vuggy reservoirs are extremely heterogeneous and exhibit the diversity and complexity in inter-well connectivity. Clarifying the influence of faults and karsts on reservoirs is conducive to reservoir connectivity analysis and injection-production strategy adjustment. Taking Unit T in the Tuofutai area of Tahe oilfield as an example, the development characteristics of reservoirs were systematically analyzed based on the results of seismic interpretation and the analysis of overlying water system and production performance responses. It was clarified that the reservoir development is mainly controlled by faults and surface water systems. The difference in karstification intensity leads to different characteristics of the reservoirs, which makes development wells show different production behaviors and inter-well connectivities. Based on the analysis of dynamic and static data, an inter-well connectivity model suitable for fault-controlled fractured-vuggy reservoirs was established, which can provide a basis for the adjustment of subsequent treatments.

Key words: Tahe oilfield, Tuofutai area, fault-controlled fractured-vuggy reservoir, karstification, main controlling factor, reservoir distribution, connectivity model

CLC Number:

TE112.24

LI Jun, TANG Bochao, HAN Dong, LU Haitao, GENG Chunying, HUANG Mina. Characteristics and Connectivity of Fault-Controlled Fractured-Vuggy Reservoirs: A Case Study of Unit T in Tuofutai Area, Tahe Oilfield[J]. Xinjiang Petroleum Geology, 2022, 43(5): 572-579.

Figures/Tables 8

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Table 1.

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