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Research and Application of Cementing Techniques for Deep and Super -deep Wells in The Fergana Basin of Uzbekistan

机译:乌兹别克斯坦费尔干纳盆地深井和超深井固井技术的研究与应用

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摘要

The reservoir in the Fergana Basin had features of deep, high pressure, high acid gas contents, supersalinity and high production. Because of that, the cementing jobs faced severe challenges such as large size casing at upper hole, long cementing segment, large temperature difference and small annular clearance with high pressure at the condition of high density drilling fluid. All of these difficulties have been solved through a series of research: cementing technique for long cementing segment and large temperature differences, high density salt — resistant spacer, high density salt -resistant anti -channeling cement slurry, corresponding technology for improving cementing quality of long cementing segments, cementing technology for deep and super — deep wells and others. These technologies have been successfully applied in Jida -3, Jida -4 and South Gumhana — 1. The cementing technologies achieved will provide technical guarantee for cementing jobs in the Fergana Basin and have broad prospects for application. In the Fergana Basin hydrocarbon resource is abundant It contains three structural belts: Karajida, Gumhana and Mingbulak. The area of the Fergana Basin which lies across three countries is about 38 thou sand square kilometers and among this area there are 17 thousand square kilometers that lie in Uzbekistan. The potential exploration of the basin mainly contains a new folded downwarping region and a side deep zone. The Karajida structural belt is at the uplift zone of middle sagging. The main formations of interest are located at the lower part of N1 and the upper part of E. Jida -3 and Jida -4 are located at the Karajida structural belt.
机译:费尔干纳盆地的储层具有深,高压,酸性气体含量高,盐度高,产量高的特点。因此,在高密度钻井液条件下,固井作业面临着严峻的挑战,如上孔套管大,固井段长,温差大,高压下环形间隙小。所有这些困难已通过一系列研究得以解决:长胶凝段和大温差的胶凝技术,高密度耐盐隔板,高密度耐盐防窜水泥浆,提高长胶凝质量的相应技术。固井段,深井和超深井等深井固井技术。这些技术已在吉达-3,吉达-4和南甘哈纳— 1成功应用。所获得的固井技术将为费尔干纳盆地的固井工作提供技术保障,并具有广阔的应用前景。在费尔干纳盆地,油气资源丰富,包括三个构造带:卡拉吉达,古哈纳和明布拉克。横跨三个国家的费尔干纳盆地的面积约为38沙平方公里,其中乌兹别克斯坦的面积为17,000平方公里。该盆地的潜在勘探主要包括一个新的褶皱下陷区和一个侧深区。卡拉吉达构造带处于中垂的隆起区。感兴趣的主要地层位于N1的下部和E的上部。吉达-3和吉达-4位于卡拉吉达构造带。

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