摘要
“井工厂”作业模式使非常规油气实现了效益开发。通过分析非常规油气井工厂钻井的特点,明确了井工厂钻井成本构成要素,并对各要素进行了量化研究;根据井工厂钻井流程整合,构建了井工厂钻井成本分析模型;明确了井工厂钻井成本的影响因素,并对其进行了优化研究,构建了井工厂钻井成本优化算法,着重考虑了平台位置和平台数、钻井顺序、钻井学习效率、井型、井眼轨迹、批量化钻井工序、钻井液重复利用率等因素,结合渤海湾盆地济阳坳陷致密油藏钻井工程实践优化了模型参数,以成本最小为目标函数,得到了最优方案,并给出了最优方案中钻井成本各要素项的占比,其中钻机费用(40.55%)、套管费用(15.11%)、钻井液费用(14.80%)和固井费用(9.89%)为排序前4的成本要素项,4项费用之和占井工厂钻井总费用的80%以上。利用“余弦相似度”算法评估了成本计算模型的可信性,误差小于2%。该研究为非常规油气井工厂钻井方案优化设计和成本概算提供了理论依据。
The operation mode of“well factory”achieves the benefit development of unconventional oil and gas.In this paper,the constituent elements of well-factory drilling cost were determined by analyzing the characteristics of the“well-factory”drilling of unconventional oil and gas,and these elements were quantitatively studied.Then,a well-factory drilling cost analysis model was established according to well-factory drilling process integration.The factors influencing well-factory drilling cost were determined and optimized.An optimization algorithm of well-factory drilling cost was developed.Several factors were mainly considered,including position and number of pads,drilling sequence,drilling learning efficiency,well type,wellbore trajectory,batch drilling sequence and drilling fluid recycling rate.Based on the practical drilling engineering in the tight oil reservoirs of Jiyang Depression,the Bohai Bay Basin,the model parameters were optimized.The optimal scheme was worked out by taking the cost minimization as the objective function,and the percentage of each drilling cost element in the optimal scheme was calculated.Rig cost(40.55%),casing cost(15.11%),drilling fluid cost(14.80%)and cementing cost(9.89%)are the top four cost elements,whose sum accounts more than 80%of total well-factory drilling cost.Finally,the credibility of the cost calculation model was evaluated by using the“cosine similarity”method,and its error is less than 2%.This research provide theoretical basis for the optimized design and cost estimate of well-factory drilling scheme of unconventional oil and gas.
作者
闫伟
丁小平
李文博
YAN Wei;DING Xiaoping;LI Wenbo(College of Artificial Intelligence,China University of Petroleum(Beijing),Beijing 102249,China;Science and Technology Research Institute of Unconventional Oil and Gas,China University of Petroleum(Beijing),Beijing 102249,China)
出处
《石油钻采工艺》
CAS
北大核心
2021年第3期265-271,共7页
Oil Drilling & Production Technology
基金
国家科技重大专项“渤海湾盆地济阳坳陷致密油开发示范工程”课题三“致密油藏开发钻井技术优化及集成”(编号:2017ZX05072-003)。
关键词
井工厂钻井
致密油
成本模型
平台部署
目标函数
well-factory drilling
tight oil
cost model
pad deployment
objective function
