廊固凹陷敏感油层修井作业保护技术研究

发布时间：2018-10-16 14:30

【摘要】：油田开发过程中,修井作业措施必不可少,也是油田生产过程中的一项重要内容,是保障油井正常生产、维持油田正常运转的关键手段。但是如果作业过程中入井液的使用不当或过度侵入储层,会造成油井产层破坏,油井产量下降的严重后果。华北油田廊固凹陷敏感区块经过多年的勘探开发,地层能量普遍偏低,修井过程中不适当的入井液和不恰当的修井工艺导致大量压井液、洗井液等入井液体侵入敏感油层,对油层造成不同程度的伤害,严重制约了油井产能的发挥,导致油井作业后排水期长,甚至难以恢复原产量情况。为了避免或降低施工作业对油层造成的伤害,本文通过对廊固凹陷敏感区块储层伤害现场调查分析,评价了回注污水对储层的伤害程度与伤害机理,优选了入井流体中的防垢剂、防膨剂,制定了科学规范的入井液管理办法,并且形成了一套较为成熟的油层保护无水化作业工艺技术,主要包括泄油器、杆式泵、射孔下泵一体化等防污染管柱工艺,以及油井机械抽砂、负压清砂工艺和配套技术,对于保障油田稳产和提高油藏最终采收率具有积极意义。
[Abstract]:In the process of oilfield development, workover operation measures are indispensable, and also an important content in oilfield production process, which is the key means to ensure the normal production of oil wells and to maintain the normal operation of oil fields. However, if the fluid is used improperly or overintruded into the reservoir during the operation, the reservoir will be destroyed and the oil production will decline seriously. After years of exploration and development, the formation energy of sensitive block in Langgu Sag of Huabei Oilfield is generally low. The improper well entry fluid and improper workover process in the workover process lead to a large amount of well killing fluid, well washing fluid and other well entry fluids intruding into sensitive reservoirs. It causes different degree of damage to oil reservoir, seriously restricts the production ability of oil well, and results in long drainage period after oil well operation and even difficult to recover the original production. In order to avoid or reduce the damage to reservoir caused by construction operation, the damage degree and mechanism of reservoir damage caused by sewage injection are evaluated by field investigation and analysis of reservoir damage in sensitive area of Langgu depression. The anti-scaling agent and anti-expansion agent in the well fluid are selected, and the scientific and standard management method of the well entry fluid is formulated, and a set of mature technology of anhydrous operation for reservoir protection is formed, which mainly includes oil drain device, rod pump, etc. The integration of perforating pump and other anti-pollution pipe string processes, as well as mechanical sand extraction, negative pressure sand cleaning technology and supporting technology, are of positive significance for ensuring stable production of oil fields and improving the ultimate oil recovery.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358.4

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