浅谈如何减少油气井酸压施工中的酸液刺漏

中石油长城钻探井下作业公司压裂酸化项目部于2009年承接了哈萨克斯坦CNPC阿克纠宾股份公司酸化工程技术服务项目,为该公司提供一定技术支撑,负责施工指挥、关键岗位的操作及施工现场管理、质量。阿克纠宾地区石油地质储量占哈萨克斯坦总量的5%,主要目的层是盐下碳酸盐岩储层,具有双孔介质,基质低孔、低渗等特征,大型酸化酸压年施工量超过80井次。自承接项目以来,发现在酸压施工中在不同程度上频繁出现酸液刺漏的问题。哈萨克项目部作为一支为该公司提供技术服务的施工队伍,确保为甲方提供优质可靠的服务一直是项目部的立足之本。所以酸压施工中酸液刺漏的问题是我们亟待解决的问题。2012年长城钻探井下哈萨克压裂酸化项目部依据中石油集团公司下发的质量方针进一步明确了质量目标,这是本次活动开展的原动力。我们秉承着为甲方提供优质服务,努力构筑良好市场氛围的原则。为此,本小组将活动题目确定为"减少油气井酸压施工中的酸液刺漏"。

油气井化学反应气动力深穿透热解堵试验研究

高能气体压裂是解决长庆低渗透油气层解堵的一项简便易行的技术手段。由于火药燃烧随压力增高呈指数增加趋势,装药量受到极大限制。火药燃烧产生大量的CO气体也是一个潜在的危险因素。国外特别是乌克兰等国家都在研究一种新型化学反应气动力热解堵的新技术。根据国外研究的思路,笔者用铝粉、NaOH、NH4NO3甲醛等数种化学物质组配进行了实验室试验研究。以期得到一种新的化学反应气动力热解堵的技术途径。

Refracturing candidate selection for MFHWs in tight oil and gas reservoirs using hybrid method with data analysis techniques and fuzzy clustering

The selection of refracturing candidate is one of the most important jobs faced by oilfield engineers. However, due to the complicated multi-parameter relationships and their comprehensive influence, the selection of refracturing candidate is often very difficult. In this paper, a novel approach combining data analysis techniques and fuzzy clustering was proposed to select refracturing candidate. First, the analysis techniques were used to quantitatively calculate the weight coefficient and determine the key factors. Then, the idealized refracturing well was established by considering the main factors. Fuzzy clustering was applied to evaluate refracturing potential. Finally, reservoirs numerical simulation was used to further evaluate reservoirs energy and material basis of the optimum refracturing candidates. The hybrid method has been successfully applied to a tight oil reservoir in China. The average steady production was 15.8 t/d after refracturing treatment, increasing significantly compared with previous status. The research results can guide the development of tight oil and gas reservoirs effectively.