Prediction of single-well-constrained recoverable reserves in beach bar sand reservoir using different fracturing methods

SU Yinghong

doi:10.11781/sysydz202104697

Volume 43 Issue 4

Jul. 2021

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SU Yinghong. Prediction of single-well-constrained recoverable reserves in beach bar sand reservoir using different fracturing methods[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(4): 697-703. doi: 10.11781/sysydz202104697

Citation:

SU Yinghong. Prediction of single-well-constrained recoverable reserves in beach bar sand reservoir using different fracturing methods[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(4): 697-703. doi: 10.11781/sysydz202104697

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Prediction of single-well-constrained recoverable reserves in beach bar sand reservoir using different fracturing methods

doi: 10.11781/sysydz202104697

SU Yinghong

SINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, China

Received Date: 2021-02-10
Rev Recd Date: 2021-05-06
Publish Date: 2021-07-28

Abstract

Abstract

Single-well-constrained recoverable reserve is an important index to evaluate whether the development of beach bar sand reservoir is economically feasible. Due to the characteristics of pressure sensitive effect, start-up pressure gradient and different fracturing methods, it is difficult to apply the conventional prediction method to single-well-constrained recoverable reserve in undeveloped ultra-low permeability beach bar sand reservoirs. In this paper, based on the static and dynamic data of typical blocks, a numerical simulation model of vertical well stratified fracturing was established. The coefficients in the characterization formula of start-up pressure gradient and pressure-sensitive effect were determined by history fitting, and the influences of pressure-sensitive effect and start-up pressure gradient on production performance were analyzed. On this basis, the influence of different reservoir parameters and development parameters on the single-well-constrained recoverable reserves of elastic development with vertical-well stratified fracturing was analyzed. The main factors of single-well-constrained recoverable reserves were determined as follows: pressure coefficient, permeability, oil saturation, effective thickness, porosity, fracture length, concentration and viscosity. A vertical-well stratified fracturing model was established by multiple regression. Compared with the data from actual production wells, the relative error was 4.58%, which showed that the formula had a high accuracy and could meet the requirements of mines. Furthermore, some prediction formulas between the single-well-constrained recoverable reserves and the reservoir parameters corresponding to the volume fracturing of vertical wells, the multi-stage fracturing of horizontal wells and the volume fracturing of horizontal wells were established. The results provided a basis for evaluating the production potential of beach bar sand reservoirs.
- beach bar sand reservoir,
- single-well-constrained recoverable reserves,
- main controlling factors,
- fracturing mode,
- reserves forecast

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References

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Prediction of single-well-constrained recoverable reserves in beach bar sand reservoir using different fracturing methods

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Prediction of single-well-constrained recoverable reserves in beach bar sand reservoir using different fracturing methods

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