Aiming at the problems that pressure energy in high-pressure NG pipeline network don't fully utilized and the adaptability of application scenarios is insufficient, a Internet data center(IDC) energy supply optimization method with multipurpose use of NG pressure energy is proposed under the background of the increasingly prominent problems of high energy consumption and carbon pollution in the data center. Firstly, the IDC energy supply system architecture considering the multipurpose use of NG pressure energy for power generation and refrigeration is designed. Then, based on the exergy analysis theory, the power generation and refrigeration output characteristic models of NG pressure energy are established. Considering the energy consumption and heat dissipation characteristics of IT equipment in the IDC, the power demand model and cold power demand model of the IDC are established. Secondly, considering the energy supply constraints of distribution network, the power constraints of gas turbines, absorption chillers and battery charging and discharging power constraints, the optimal scheduling model is constructed with the minimum daily operating cost as the objective function. Finally, the simulation is carried out according to the energy consumption demand data setting example of a NG pressure regulating station and a class A IDC in Southwest China, which verifies the feasibility and economy of the proposed system scheme and optimization method.
针对超稠油油藏SAGD开发中蒸汽腔发育不均衡、横向扩展缓慢和汽窜等问题,在SAGD基础上采取了多井型组合、多介质辅助及多措施方式等方法进行开发增效,其中,直井辅助SAGD可以明显改善蒸汽腔发育,提高采油速度且所需费用较少,可操作性较强.目前,直井辅助SAGD技术的关键参数尚无系统性的论证.为了达到最优生产效果,通过数值模拟对风城油田超稠油典型井区Z01井区直井辅助时机、考虑隔夹层时射孔参数、直井吞吐预热阶段的注采参数、直井转汽驱辅助阶段的注采参数进行了优化研究.研究结果表明,直井辅助双水平井SAGD措施能有效地提高水平井动用程度和采油速度,改善开发效果,参数优化后的方案切实有效.该研究为超稠油油藏直井辅助SAGD高效开发提供了重要技术支撑.
碳酸盐岩储层孔-缝-洞组合类型多样,从孔隙尺度刻画和认识气水两相在不同类型储层中的流动规律具有重要的科学意义.建立了适用于深层碳酸盐岩储层气水两相流动的多松弛颜色梯度格子玻尔兹曼模型(LBM),实现了气水两相在多孔介质中的可视化模拟,揭示了成藏过程(气驱水)和水侵过程(水驱气)不同孔-缝-洞组合流动通道中的气水两相动态流动行为.研究表明,碳酸盐岩气藏成藏过程中主要存在的残余水类型有盲端孔隙水、洞穴边部残余水、水膜水、"H型"残余水和网状残余水;水侵过程中,主要存在的封闭气类型有盲端孔隙封闭气、变径卡断气、绕流封闭气、"H型"封闭气和网状封闭气;由于洞穴体积较大,成藏和水侵过程中缝洞型储层残余水饱和度和封闭气饱和度均最大;裂缝型和缝洞型储层的气相渗流能力随含水饱和度变化波动明显,呈非线性变化规律.研究成果可为深层碳酸盐岩气藏微观渗流、水侵动态预测等提供理论支撑.
长堤地区具有很大的油气分布成藏潜力,但限于该地区复杂的构造情况,层序及沉积等情况不明.为探明该区内层序发育及湖平面变化情况,基于高分辨率层序划分及小波分析定量层序划分的方法,利用测井、录井等资料在长堤地区东营组划分出4个三级层序、10个准层序组及19个准层序,并在测井小波变换分析的基础上绘制出Fischer图解,揭示了长堤地区东营组的可容纳空间的变化,近似反映了研究区相对湖平面的变化趋势.研究表明,研究区内东营组呈现一次大规模的湖退和湖侵,其内部的小规模湖退与湖侵的过程与三级层序相互吻合.SQ1期,相对湖平面达到最大值,期间有小规模的湖侵湖退,此后缓慢湖退,在SQ2末期达到最低值.SQ3期快速湖侵后又快速湖退,维持在相对低值波动,整体上表现为湖盆萎缩,被三角洲平原覆盖.
粒子冲击钻井是一种新型高效的钻井技术,结合冲击技术和机械破岩,实现了钻头在研磨性硬地层的高效钻进.当前粒子冲击辅助破岩的机理还不够明确,为优化粒子冲击钻井参数,提高钻井效率,基于离散元颗粒流方法,建立了具有微观聚团特性的黑砂岩数值模型.在考虑黑砂岩的矿物组分及占比情况下,研究了粒子在不同粒径、入射角度、入射速度条件下的单粒子冲击、多粒子冲击及辅助切削破岩规律.研究表明:1)粒子冲击辅助切削破岩相比传统切削破岩效率更高,粒子粒径在1.5和3.0 mm时,破岩比功会呈现急剧降低的现象,粒径在1.5-2.5 mm破岩比功变化不大;2)粒子粒径、入射角度和入射速度对辅助破岩有重要影响,为提高辅助破岩效率,建议使用粒径为3.0 mm的粒子和0°～25.的入射角度,同时加大入射速度.研究表明,粒子冲击钻井技术是提高研磨性硬地层高效钻进的有效手段,研究结果能为该技术的发展提供一定的指导意义.
