發(fā)布時間：2019-05-25 01:51

【摘要】：保溫保壓取心技術(shù)是能使取出的巖心始終保持在地層原始壓力和溫度狀態(tài)的取心技術(shù),巖心始終保持原始的溫度壓力狀態(tài),巖石的物理性質(zhì)不會應(yīng)壓力釋放而發(fā)生破壞、巖心中的流體也不會因為溫度和壓力的變化發(fā)生揮發(fā)及流失,對于正確認識地質(zhì)情況和進行殘余油儲量計算,合理地制定開發(fā)調(diào)整井方案,提高采收率有重要意義。該技術(shù)是可燃冰勘探開發(fā)的關(guān)鍵技術(shù)之一,在提升可燃冰的樣品獲得率方面具有重要作用,該技術(shù)的成功研制對推動我國的可燃冰開發(fā)具有重要而深遠的意義。本文主要對該項技術(shù)的保溫技術(shù)、保壓技術(shù)、數(shù)據(jù)處理技術(shù)、巖心處理技術(shù)等方面進行了系統(tǒng)研究,提出了組合式隔熱概念,研發(fā)出了可切割復(fù)合真空隔熱保溫內(nèi)筒,采用內(nèi)筒獨立密封方式和隨鉆測量系統(tǒng),實現(xiàn)了取心工具的高可靠性、高安全性、易操作性。研究設(shè)計的樣機在常規(guī)實驗井中取得保壓成功率93%、保溫率80%、溫度變化率2~2.5℃/h的良好效果,該技術(shù)的成功研制常規(guī)油氣田儲量計算、具有重要作用,對頁巖氣、可燃冰等費常規(guī)能源開發(fā)業(yè)具有重要的經(jīng)濟意義和戰(zhàn)略意義。
[Abstract]:Heat preservation and pressure holding coring technology is a coring technology which can keep the removed core in the original pressure and temperature state of the formation all the time, and the core always maintains the original temperature and pressure state, and the physical properties of the rock will not be destroyed by pressure release. The fluid in the core will not volatilize and lose because of the change of temperature and pressure, which is of great significance for the correct understanding of geological conditions and the calculation of residual oil reserves, the reasonable formulation of development adjustment well scheme and the improvement of oil recovery. This technology is one of the key technologies in flammable ice exploration and development, and plays an important role in improving the sample acquisition rate of combustible ice. The successful development of this technology is of great and far-reaching significance to promote the development of combustible ice in China. In this paper, the heat preservation technology, pressure holding technology, data processing technology and core processing technology of this technology are systematically studied, the concept of combined heat insulation is put forward, and the cut composite vacuum heat insulation inner cylinder is developed. The independent sealing mode of the inner cylinder and the measuring system while drilling are adopted to realize the high reliability, high safety and easy operation of the coring tool. The prototype has achieved good results of 93% pressure holding success rate, 80% heat preservation rate and 2 鈮，

本文編號：2485389