Volume 37 Issue 6
Dec.  2020
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ZHONG Xiaojun, ZHANG Rui, WU Gang, YIN Zheng, WANG Xiaochao, LU Hao, GAO Yuebin. Study on Dynamic Characteristics of Acid Rock Reaction and Acid Fracturing Countermeasures in Complex Heterogeneous Carbonate Reservoirs[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(6): 798-802. doi: 10.3969/j.issn.1001-5620.2020.06.021
Citation: ZHONG Xiaojun, ZHANG Rui, WU Gang, YIN Zheng, WANG Xiaochao, LU Hao, GAO Yuebin. Study on Dynamic Characteristics of Acid Rock Reaction and Acid Fracturing Countermeasures in Complex Heterogeneous Carbonate Reservoirs[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(6): 798-802. doi: 10.3969/j.issn.1001-5620.2020.06.021

Study on Dynamic Characteristics of Acid Rock Reaction and Acid Fracturing Countermeasures in Complex Heterogeneous Carbonate Reservoirs

doi: 10.3969/j.issn.1001-5620.2020.06.021
  • Received Date: 2020-09-12
  • Publish Date: 2020-12-28
  • Different from the domestic and overseas large seam hole type carbonate reservoir, northern Langgu depression Yangshuiwu buried hill in Jizhong depression has its own unique characters such as high buried depth, high temperature, low permeability, dense reservoir spaces and strong heterogeneity. Under those circumstances, fracturing acidizing transformation became the necessary technology in order to improve the single well production but it still has shortcomings like poor pertinence due to the different lithology and fracture development, complex acid-rock reaction.From the analyses of the reservoir characters of Yangshuiwu buried hill fengfeng group, upper majiagou group, lower majiagou group, and liangjiashan group, this essay carried out the study on acid rock reaction controlling factors, build up acid-rock reaction kinetics equation in different types of reservoirs. According to the results of acid-rock reaction experiment and fracture conductivity evaluation, this essay put forward personalized acid fluid formula and countermeasures of the above four sets of reservoirs. It has efficiently guided the reconstruction of 13 Wells in those blocks. Beside providing a technical support for the use of reservoirs in 100-million-ton scales, this essay also provided a reference for the design of the similar matrix of fractured carbonate rock reservoir reconstruction in domestic field.

     

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