A New Method to Determine Initial Production of Steam Stimulation in Offshore Heavy Oilfield

doi:10.7657/XJPG20200314

Abstract

Abstract:

In view of the simple assumption and poor adaptability of the current production prediction model for steam stimulation, methods of well testing and analogy are generally used to determine the initial production of steam stimulation in offshore heavy oilfields. At present conventional well testing is carried out in offshore oilfields, which cannot directly obtain initial oil production of thermal recovery. The paper proposes a new method to determine the initial production of steam stimulation for offshore heavy oilfields, and establishes a initial production multiple prediction model for steam stimulation compared with conventional development. The results show that the production multiple at the initial steam stimulation stage is mainly affected by reservoir permeability, oil viscosity, injection intensity, steam dryness and other factors. A nonlinear prediction model among initial production multiple, reservoir parameters and injection parameters is established by using the mathematical methods of orthogonal test design and multiple regression. The prediction error of the new model is less than 5% and the reliability is high. The new method can provide basis for the accurate determination of the initial production of the offshore steam stimulation.

Key words: offshore heavy oilfield, thermal recovery, steam stimulation, tested production, initial production, production multiple, predic- tion model

CLC Number:

TE345

ZHENG Wei, TAN Xianhong, WANG Taichao, ZHU Guojin, ZHANG Lijun. A New Method to Determine Initial Production of Steam Stimulation in Offshore Heavy Oilfield[J]. Xinjiang Petroleum Geology, 2020, 41(3): 344-348.

Figures/Tables 10

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