徐深气田空气钻井转换雾化钻井最佳时机确定

发布时间：2018-07-23 08:18

【摘要】：针对空气钻井地层出水后,岩屑易形成泥环造成环空循环不畅等问题,需要确定转化为雾化钻井的时机,开展了临界地层出水量及最佳转化时机研究与试验。通过使用烘干的采集于空气钻井不同层位的岩样,开展了气体雾化水、岩屑吸水、岩心吸水及岩屑吸水形态变化地面试验,得到了岩屑吸水后形态变化情况,得出岩屑聚团是气体钻井出水后危险的状态。同时以空气钻井裸眼段长度1 000 m为例,经过对试验数据分析,当排砂管线内有自由水出现,地层出水量为0.51 m~3/h时,空气钻井应及时转换成雾化钻井。现场试验表明,通过试验手段得到空气钻井转化成雾化钻井转化时机能够有效地指导徐深气田空气钻井安全施工。
[Abstract]:In view of the problems such as bad circulation of annulus caused by debris forming easily after air drilling formation effluent, it is necessary to determine the time to be converted into atomization drilling, and to carry out the research and test of critical formation water output and optimal conversion time. By using dry rock samples collected in different layers of air drilling, ground tests of gas atomization water, water absorption by cuttings, water absorption by core and changes of water absorption morphology by cuttings were carried out, and the morphological changes of cuttings after water absorption were obtained. It is concluded that the cuttings cluster is a dangerous state after gas drilling. At the same time, taking the 1 000 m length of the open hole in air drilling as an example, through the analysis of the test data, when there is free water in the sand discharge pipeline and the formation water output is 0.51 mm3 / h, the air drilling should be converted into atomized drilling in time. The field test shows that the conversion time from air drilling to atomized drilling can effectively guide the safe construction of air drilling in Xushen gas field.
【作者单位】：中国石油大庆钻探工程公司钻井工程技术研究院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”子课题“碳酸盐岩、火成岩及酸性气藏高效安全钻井技术”(编号:2011ZX05021-002) 中国石油集团公司重大科技专项课题“深层天然气高效开发技术研究与应用”(编号:2016E-0211)
【分类号】：TE24

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