| “压稳防漏”固井工艺在旬邑-宜君区块的研究与应用 |
| 投稿时间：2018-09-05 修订日期：2019-04-17 点此下载全文 |
| 引用本文：汤祖明.“压稳防漏”固井工艺在旬邑-宜君区块的研究与应用[J].钻探工程,2019,46(6):41-46.TANG Zuming. Research and application of “kill-and-seal” cementing technology in Xunyi-Yijun Block[J]. Drilling Engineering, 2019,46(6):41-46. |
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| 中文摘要:旬邑—宜君区块位于鄂尔多斯盆地伊陕斜坡南与渭北隆起结合部，目前处于开发初期阶段。由于三叠系延长组地层沉积环境及后期构造运动的原因，形成地层不整合接触裂缝和地层应力裂缝，造成在钻井与固井过程中易发生漏失，导致水泥浆上返不足，上部井段未得到有效封固。本文通过对工区地层情况、钻进方式和设备、水泥浆浆柱结构以及施工工艺方面进行研究，探究漏失发生的主要因素。为达到提高油气层封固质量的目的，在工程上针对性地提出防漏措施，优化水泥浆配方，使浆体具有一定堵漏性能，依据“压稳防漏”平衡固井理念，更改浆柱结构和施工工艺。通过采用新技术措施后，工区内油气井环空水泥浆返高及胶结质量满足后期压裂改造要求。 |
| 中文关键词:固井 旬邑—宜君区块 地层裂缝 压稳防漏 |
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| Research and application of “kill-and-seal” cementing technology in Xunyi-Yijun Block |
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| Abstract:The oilfield of Xunyi-Yijun is located in the south of the Yi-Shan slope in Ordos Basin and is in its early stage of development. The formation unconformity contact cracks and stress cracks were formed due to the sedimentary environment of the Yanchang group of Triassic and the late tectonic movement, which makes it easy to lost circulation in the drilling and cementing process, resulting in insufficient return of the cement slurry; thus, the upper well section had not been effectively sealed. In this paper, the main factors for leakage are investigated by studying the geology, the drilling process and the drilling equipment, the slurry column structure and cementing technology in the oilfield. In order to improve the sealing quality of the oil and gas layer, the paper puts forward the anti leakage measures; optimizes the cement slurry formulation, which makes the slurry provide certain plugging performance; and modifies the slurry column structure and cementing process according to the “kill and seal” balanced cementing concept. After adopting the technical measures, the cement slurry return height and cementing quality of the oil and gas well in the job area met the requirements of the later fracturing treatment. |
| keywords:cementing Xunyi-Yijun Block formation fractures well kill and seal |
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