Optimization of Fracture Parameters for Staged Fracturing with Temporary Fiber  Plugging and Diversion in Highly Deviated Wells and Horizontal Wells in Deep Carbonate Reservoirs

doi:10.3969/j.issn.1006-6535.2022.03.025

Abstract

Abstract: To further increase the number of stages of staged fracturing and achieve full-well staged fracturing of highly deviated wells and horizontal wells in Types II and III reservoirs in Gaoshiti-Moxi Area, Sichuan Basin, a laboratory experiment was conducted for physical simulation of temporary plugging and turnaround staged fracturing to optimize staged fracturing parameters. The study showed that, the mass fraction of temporarily plugged fibers and the construction displacement are the key factors affecting the diversion effect; the plugging pressure reached the pressure limit of 15 MPa at a mass fraction of 2.5% and a displacement of 120-250 mL/min for fiber combinations with fiber length of 3-12 mm, forming a stable plug without breakout. The results of the study were applied to multi-stage fracturing of highly deviated wells and horizontal wells in Types II and III reservoirs, Gaoshiti-Maoxi Area, confirming the feasibility of the technology. The test production was increased by 46% compared to similar reservoirs where staged fracturing was not implemented. The study provides a reference for promoting the effective prediction of low-grade resources in carbonates.

Key words: deep carbonate rock, highly deviated well, horizontal well, fiber temporary plugging and diversion, multistage staged fracturing, Sichuan Basin

CLC Number:

TE377

Zhu Wenzhao, Miao Juan, Chen Siyun, Lei Lei, Liu Ju. Optimization of Fracture Parameters for Staged Fracturing with Temporary Fiber Plugging and Diversion in Highly Deviated Wells and Horizontal Wells in Deep Carbonate Reservoirs[J]. Special Oil & Gas Reservoirs, 2022, 29(3): 170-174.

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Optimization of Fracture Parameters for Staged Fracturing with Temporary Fiber Plugging and Diversion in Highly Deviated Wells and Horizontal Wells in Deep Carbonate Reservoirs

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