[1]侯騰飛  張士誠  馬新仿  李棟  孫延安.支撐劑沉降規律對頁巖氣壓裂水平井產能的影響[J].石油鉆采工藝,2017,39(5):638-645.[doi:10.13639/j.odpt.2017.05.019]
 HOU Tengfei,ZHANG Shicheng,MA Xinfang,et al.Effect of proppant settlement laws on the productivity of shale-gas horizontal wells after the fracturing[J].Oil Drilling & Production Technology,2017,39(5):638-645.[doi:10.13639/j.odpt.2017.05.019]
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支撐劑沉降規律對頁巖氣壓裂水平井產能的影響
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《石油鉆采工藝》[ISSN:1000-7393/CN:13-1072/TE]

卷:
39卷
期數:
2017年5期
頁碼:
638-645
欄目:
油氣開采
出版日期:
2017-09-20

文章信息/Info

Title:
Effect of proppant settlement laws on the productivity of shale-gas horizontal wells after the fracturing
文章編號:
1000 – 7393( 2017 )05 – 0638 – 08
作者:
侯騰飛1  張士誠1  馬新仿1  李棟1  孫延安2
1. 中國石油大學(北京)石油工程學院;2. 大慶油田有限責任公司采油工程研究院
Author(s):
HOU Tengfei1 ZHANG Shicheng1 MA Xinfang1 LI Dong1 SUN Yan’an2
1.College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; 2. Production Engineering and Research Institute, Daqing Oilfield Co., Ltd., Daqing 163400, China
關鍵詞:
支撐劑沉降敏感性分析頁巖氣水平井產能
Keywords:
proppant settlement sensitivity analysis shale gas horizontal well productivity
分類號:
TE357
DOI:
10.13639/j.odpt.2017.05.019
文獻標志碼:
A
摘要:
壓裂工藝后支撐劑的分布及裂縫形態對頁巖氣井的產能有很大影響。為了研究支撐劑沉降規律,建立了綜合考慮頁巖氣吸附解吸附及應力敏感的氣藏數值模型,并在模型中提出了表征支撐劑沉降的方法。通過對比分析不同射孔位置、不同沉降程度、裂縫導流能力、儲層基質滲透率等參數變量,考慮了支撐劑沉降的頁巖氣藏壓力分布和產能特征,得出影響支撐劑沉降后氣井產能的主控因素。結果表明,支撐劑沉降大幅度降低了氣井產能;考慮壓裂過程中支撐劑運移沉降,應在油氣藏中下部進行射孔;頁巖氣藏裂縫導流能力達到4 μm2·cm 即可滿足氣井的有效開采,選用40/70 目支撐劑進行壓裂施工,建議優先造主縫;基質滲透率越高,支撐劑沉降對氣井產能影響越大,高滲帶要采取防止支撐劑沉降的措施。此模型考慮了支撐劑沉降的特性,對頁巖氣井產能的預測和現場壓裂施工具有重要指導意義。
Abstract:
The productivity of shale gas wells is greatly influenced by proppant distribution and fracture morphology after the fracturing. To investigate the proppant settlement laws, the numerical reservoir model considering adsorption, desorption and pressure sensitivity of shale gas comprehensively was established. In this model, the method characterizing proppant settlement is developed. Then, parametric variables were compared and analyzed, e.g. perforation location, settlement degree, fracture conductivity, reservoir matrix permeability. The pressure distribution and productivity characteristics of shale gas reservoirs were studied in consideration of proppant settlement. And the main factors controlling the productivity of gas wells after proppant settlement were figured out. It is indicated that the productivity of gas wells is decreased greatly by proppant settlement. Considering the migration and settlement of proppant in the process of fracturing, perforation shall be carried out in the middle and lower parts of gas reservoirs. If the fracture conductivity of shale gas reservoirs is up to 4 μm2·cm, gas wells can be exploited effectively. The proppant of 40/70 mesh is selected for fracturing. It is recommended to create the main fractures preferentially. The productivity of gas wells is influenced more by proppant settlement as the matrix permeability is higher, so some measures shall be taken in high-permeability zones to prevent proppant settlement. This model takes into consideration the characteristics of proppant settlement, so it can be used as the important guide for the productivity prediction and on-site fracturing of shale gas wells.

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