BS区块大斜度井分段压裂工艺研究与应用
Study on Staged Fracturing Process for Highly-deviated Wells in Block BS and its Application
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- 引用格式:
-
付大其,程运甫,李树林,刘洋,吕恒富.BS区块大斜度井分段压裂工艺研究与应用[J].天然气与石油,2013,31(5):0.doi:
.Study on Staged Fracturing Process for Highly-deviated Wells in Block BS and its Application[J].Natural Gas and Oil,2013,31(5):0.doi:
- DOI:
- 作者:
- 付大其1 程运甫1 李树林2 刘 洋3 吕恒富4
- 作者单位:
- 1. 中国石油大港油田石油工程研究院，2. 天津市万众科技发展有限公司，3. 中国石油大港油田油气藏评价事业部，4. 中国石油西南油气田公司蜀南气矿
- 关键词:
- 大港油田；大斜度井；井下微地震；分段压裂
Dagang oilfield； Highly-deviated well； Downhole microseism； Fracturing
- 摘要:
- 大港油田BS85区块储层具有物性差、泥岩含量高、自然产能低等特点，需要通过压裂改造才能获得工业油流。BS19-67井是该区块的一口大斜度井，最大井斜67.69°，为最大限度改造储层，采用套管固井+滑套分段压裂工艺技术分5段进行压裂。由于该区块无准确的地应力方位测试数据，有可能在裂缝方位与井筒方位形成较小夹角，增加了施工难度。因此采用支撑剂段塞工艺、大排量施工等技术保证施工成功率，并在压裂施工过程中采用井下微地震技术对裂缝进行监测，为下步设计优化提供依据。
Dagang Oilfield block BS85 reservoir has such characteristics as poor physical property，high mudstone content and low natural productivity，it is necessary to conduct fracturing transformation so as to obtain commercial oil flow. Well BS19-67 is a high angle well in this block，with the maximum inclination of 67.69° ，which is a reservoir with the maximum transformation. This reservoir is developed by using casing cementing plus sliding sleeve staged fracturing technique for fractureing in 5 sections. Because no accurate in-situ stress orientation testing data of this area are available，it will be possible to form small angle between fracture azimuth and wellbore azimuth，which will increase the difficulty of construction. Therefore，applied are such construction techniques as proppant slug process and discharge capacity enlargement to assure the success rate. At the same time，downhole microseismic technology is applied to monitor fractures occurring probably in fracturing construction，which can provide the basis for optimization design in the future.
