摘要
针对大牛地气田致密低渗地层特征,在总结水平井压裂工艺应用情况及其优缺点的基础上,开展了水平井段内多裂缝压裂新工艺的研究,特别是对水平井段内多裂缝压裂使用高强度水溶性暂堵剂的控制工艺原理以及段内裂缝的干扰进行了分析。并对DPT-8和DPH-60两口水平井实施了段内多缝压裂技术的现场应用试验。试验结果表明,该技术利用暂堵剂能依次封堵先期压裂形成的裂缝,使其不断蹩压而在段内发生多次起裂并延伸,形成多条新的裂缝,从而有效地增加改造体积,扩大泄油气面积或范围,进而提高压裂改造程度和油气增产效果。并能节约封隔器和压差滑套,降低施工作业成本,为大牛地气田致密低渗储层的改造探索出了新的技术途径。
Most reservoirs in Daniudi gasfield are characterized by tight and low permeability. A new technology,multifractures fracturing,is used for horizontal well section based on the application and advantages and disadvantages of horizontal- well fracturing technology. Especially,its processing principle using high- intensity water- soluble temporary plugging agent and its interference from fractures are analyzed. Moreover,its application was carried out for two horizontal wells( DPT- 8 and DPH- 60). Result shows that this technology uses temporary plugging agent to plug sequentially fractures formed by fracturing. After that,new fractures can form due to mounting pressure. Therefore,the reconstruction volume and drainage area can be enlarged effectively to finally increase both fracturing intensity and stimulation effect. Moreover,the technology may lessen the numbers of packer and differential- pressure sliding sleeve,and reduce the construction cost. It provides a new way to reconstruct the tight and low- permeability reservoirs in Daniudi gasfield.
出处
《天然气勘探与开发》
2014年第1期64-67,99-100,共4页
Natural Gas Exploration and Development
关键词
致密低渗储层
水平井压裂
段内多裂缝压裂
大牛地气田
tight and low-permeability reservoir,horizontal-well fracturing,multifractures fracturing in horizontal well section,Daniudi gasfield
