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Study and Application of Carbon Dioxide Slug Assisting Fracture Technology on Zhuang 74 Block

Author: ZhengYong
Tutor: ChenDeChun；ChenJun
School: China University of Petroleum
Course: Petroleum and Natural Gas
Keywords: Hydraulic fracturing Carbon dioxide Miscible pressure test Zhuang 74 block
CLC: TE357
Type: Master's thesis
Year: 2009
Downloads: 85
Quote: 0
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Abstract


Domestic oilfield universal access to high water cut stage conventional well stimulation measures, such as the conventional acidification , conventional fracturing, deplugging the technical measures yield results , but often there are the following problems : a small range of measures to increase short a period ; Scope small ; measures caused formation damage ; wells the repeated fracturing treatment effect is unsatisfactory ; clog ingredients formation is more complex, integrated plugging and conventional fracturing treatment effect is often unsatisfactory . So CO2 slug secondary fracturing technology research is necessary and important . The pile 74 blocks ultra-low permeability reservoir development in the Note would not join , mining not the status quo , fracturing and re-fracturing block yield initially achieved a certain effect , but with the formation energy drop The large , guanidine plastic sand-carrying fluid flowback and other reasons not timely impact in recent years, increasing oil gradually worse . In order to improve the the pile 74 ultra-low permeability fracturing block the effect of increasing oil plan made ​​seam to improve the hydraulic fracturing low permeability reservoir the seepage capacity and CO2 throughput mixed phase to reduce the mobility ratio and the complementary formation energy combine . As preflush can effectively expand the contact area with the reservoir crude oil , play a mixed phase effect , played the role of adsorbed and dissolved gas cleanup after fracturing and crude oil production increased by injecting liquid CO2 . Pile of 74 blocks of low permeability reservoir characteristics , made ​​seam to improve the hydraulic fracturing low permeability reservoir percolation capacity of CO2 stimulation in mixed phase to reduce the mobility ratio and combine complementary formation energy pile of 74 blocks of sustained yield . Study the technical principles of hydraulic fracturing , and carbon dioxide throughput increase of oil ; auxiliary hydraulic fracturing experiments study the design and implementation determine the minimum miscibility pressure of the carbon dioxide throughput experimental research and carbon dioxide ; explore and analyze the optimization of hydraulic fracturing design methods , design carbon dioxide slug assisted fracturing optimization ; and final evaluation of the program designed by the numerical simulation ; Finally , field trials , summary of the field application of the the pile 74 blocks of carbon dioxide auxiliary fracturing technology and make the appropriate economic evaluation .

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CLC: > Industrial Technology > Oil and gas industry > Oil and gas development and mining > Production Engineering > Enhanced oil recovery and maintain reservoir pressure (secondary and tertiary oil recovery )
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