【摘要】 针对南美洲Llanos盆地Dorotea区块低幅度构造圈闭落实难度大、砂体成因及展布不清楚、新井投产后含水上升、钻井事故率高等技术难题,在充分调研国内外类似油田成熟的勘探开发理论与技术基础上,通过开展专项技术研究,探索形成了地层划分与小层对比、低幅度构造解释、薄储层预测、油水层识别、稀疏井网油藏地质建模、油藏数值模拟、水平井开采、复杂井眼条件下优快钻井以及射孔参数优化等配套技术系列,有效地解决了制约低幅度、强底水驱、岩性—构造型油藏的滚动勘探及储量难以动用问题,使该项目剩余圈闭有所增加、探井成功率明显提高,储量、产量规模大幅增加,经营效益彻底改善。更多还原

【Abstract】 Located in the slope belt of Llanos Basin in South America, Dorotea block has a number of technological bottlenecks, such as diffi culty for confi rmation of low-amplitude structural trap, unclear genesis and distribution of sand body, high water-cut after new wells put into production, and high drilling accident rate. Based on study of mature exploration and development theories and technologies for similar oilfi elds both at home and abroad, special technological study is conducted to develop a series of technologies, such as stratigraphic classifi cation and layer correlation, interpretation of low-amplitude structure, prediction of thin layers, identifi cation of oil and water layers, geological modeling for sparse well pattern, reservoir numerical simulation, horizontal well production, optimization of drilling under complicated hole conditions, and optimization of perforation parameters. Those technologies have effectively solved the bottlenecks in progressive exploration of low-amplitude lithologic-structural oil reservoir with strong bottom water driving. As a result, the remaining traps of this project are increased while success rate of exploration well is obviously improved. With the reserve and production signifi cantly raised, the economic performance is also improved substantially.更多还原