Injection-Production Optimization of Carbonate Oil Reservoirs Based on a Well Connectivity Model

doi:10.7657/XJPG20210511

Abstract

Abstract:

Carbonate oil reservoirs are very heterogeneous, so that injected water is easy to advance through high-permeability channels, and results in water channeling or flooding, and consequently fast rising water cut and low development effeciency in production wells. Based on the principle of well connectivity, and considering the geological features and development performance of fractured-vuggy carbonate oil reservoirs, parameters of well connectivity (conductivity and connected volume) were quantitatively characterized, then a vertical multi-layer well connectivity model was established, and parameters such as plane splitting coefficient and utilization rate of injected water were estimated for each layer of the oil reservoirs, and finally by using automatic history matching method and production optimization algorithm, real-time optimization and prediction of production performance of oil and water wells were realized. Field application has proved that the yearly incremental oil production is 1.1×10⁴ m³ by using this method and good effect has been obtained. The method has important guiding significance for efficient development of similar oil reservoirs.

Key words: carbonate oil reservoir, well connectivity, conductivity, utilization rate of injected water, injection-production optimization

CLC Number:

TE344

LEI Sheng, ZHOU Yuhui, WANG Ning, Saierjiang AHATI, ZHENG Qiang, SHENG Guanglong. Injection-Production Optimization of Carbonate Oil Reservoirs Based on a Well Connectivity Model[J]. Xinjiang Petroleum Geology, 2021, 42(5): 584-591.

Figures/Tables 8

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