Volumetric Fracturing with Mixed Water in Tight Gas Reservoirsin the Hangjinqi Block

JIA Guangliang; SHAO Tong; YIN Xiaoxia; JIANG Shangming; XU Wensi; WANG Yuzhu

doi:10.11911/syztjs.2018143

Volume 47 Issue 2

Apr. 2019

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Petroleum Drilling Techniques > 2019 > 47(2): 87-92. > DOI: 10.11911/syztjs.2018143

JIA Guangliang, SHAO Tong, YIN Xiaoxia, JIANG Shangming, XU Wensi, WANG Yuzhu. Volumetric Fracturing with Mixed Water in Tight Gas Reservoirsin the Hangjinqi Block[J]. Petroleum Drilling Techniques, 2019, 47(2): 87-92. DOI: 10.11911/syztjs.2018143

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Volumetric Fracturing with Mixed Water in Tight Gas Reservoirsin the Hangjinqi Block

1.
Sinopec North China Oilfield Service Corporation, Zhengzhou, Henan, 450000, China
2.
Laojunmiao Oil Production Plant, PetroChina Yumen Oilfield Company, Jiuquan, Gansu, 735000, China

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Received Date: June 11, 2018
Revised Date: November 26, 2018
Available Online: January 10, 2019

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Abstract

Abstract

The goal of the study was to develop best practices for hydraulic fracturing in the complicated mixed water conditions in the tight gas reservoirs of the Hangjinqi Block. The study was necessary due to challenges such as poor physical properties, limited fracture length to cover reservoir stimulation volume, and low initial post-frac production in the tight gas reservoirs of Hangjinqi Block in the Ordos Basin. In viewing of those challenges and combining with reservoir geological characteristics of the lower Shihezi Formation within the block, key factors affecting volumetric fracturing with mixed water were analyzed, fracturing fluid system selected, and the optimization on the pumping flow rate and operation scale carried out to establish volumetric fracturing technology suitable for the tight gas reservoirs in Hangjinqi Block. In this technology, different types of fluids such as slick water, linear gel and cross-linker for the alternative fracturing are adopted, and forms high-conductive main fractures and complex branched fractures while opening the natural fractures in the reservoir to realize 3D stimulation. This technology has been applied in 5 wells in the block with average open flow capacity 13.2×10⁴m³/d. The research showed that this technology can help in solving the problems of non-sufficient reservoir stimulation volume from limited single fracture length and low post-fracturing production, and it demonstrates a good potential for further development of standard application practices.
- tight gas reservoir,
- fracturing fluid,
- volume fracturing,
- fracture conductivity,
- Hangjinqi Block

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Volumetric Fracturing with Mixed Water in Tight Gas Reservoirsin the Hangjinqi Block

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