Study on the Optimal Volume Fracturing Design for Horizontal Wells in Tight Oil Reservoirs

Yenan Jie, Jing Yang, Desheng Zhou (), Haiyang Wang, Yi Zou (), Yafei Liu and Yanjun Zhang
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Yenan Jie: Petroleum Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Jing Yang: Oil Recovery Plant No.12, PetroChina Changqing Oilfield Company, Qingyang 745400, China
Desheng Zhou: Petroleum Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Haiyang Wang: Petroleum Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Yi Zou: Petroleum Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Yafei Liu: Petroleum Engineering College, Xi’an Shiyou University, Xi’an 710065, China
Yanjun Zhang: Petroleum Engineering College, Xi’an Shiyou University, Xi’an 710065, China

Sustainability, 2022, vol. 14, issue 23, 1-15

Abstract: The application of horizontal well volume fracturing technology is an important method for enhancing oil recovery in tight oil reservoirs. However, the influence mechanism of the fracture placement scheme (FPC) on postfracturing productivity is still unclear. Based on the theory of the black oil model, combined with the reservoir stimulation characteristics of horizontal well volume fracturing in tight oil reservoirs, this paper established a postfracturing reservoir production simulation model. History fitting was used to verify the accuracy of the production model simulations. A series of numerical simulations was carried out to study the influence mechanisms of the fracture parameters and FPC on productivity. The simulation results show that compared with the fracture conductivity, the fracture length and number are the main parameters affecting tight oil reservoir productivity. Selecting a reasonable fracture length and number can realize the economical and efficient production of tight oil reservoir volume fracturing. Compared with the traditional fracture equal-length scheme, an FPC with an uneven fracture length can increase the cumulative oil production of oil wells. Under the condition of the same total fracture length, the scheme with a staggered distribution of long fractures and short fractures has the largest cumulative oil production over five years. A reasonable well spacing can greatly reduce the impact of interwell interference on postfracturing dual branch horizontal well productivity. When dual branch horizontal well fractures are alternately distributed, the postfracturing productivity is higher. The production simulation model established in this paper provides a method to accurately evaluate the productivity of horizontal wells after volume fracturing, which can provide guidance for the optimization of hydraulic fracturing operation parameters.

Keywords: horizontal well; volume fracturing; fracture placement scheme; oil and gas production (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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