苏丹大型复杂砂岩油田水平井技术研究与应用

P油田是中石油在苏丹发现的特大型整装油田,开发初期采用大井距、大段合采、稀井高产等快速上产开发技术,造成含水上升快、储层动用程度不均、层间矛盾突出等问题。针对油田开发现状和油藏特点,在块状底水稠油油藏和层状边底水高凝油油藏分别开展水平井适用性研究,并优化水平井设计参数。根据研究结果部署的水平井在P油田应用后取得了很好的效果,既加快了稠油和高凝油储量动用,又抑制了边水指进和底水锥进,提高了单井产量和油田采收率。

Research and application of horizontal well technology for large complex sandstone oilfields in Sudan

The P oilfield is a supergiant integrated oilfield in Sudan.In the initial production period,the oilfield had adopted fast production strategies such as large well spacing,commingled production from long interval and high production rate from sporadic wells,which had resulted in rapid water cut rising,uneven producing degree of reserves,and serious interlayer interference.Therefore,the applicability of horizontal wells has been researched respectively for massive heavy oil reservoirs with bottom water and laminated high pour-point oil reservoirs with edge/bottom water,and the design parameters of horizontal wells have been optimized according to the oilfield development status and reservoir characteristics.The horizontal wells arranged in the P oilfield according to the research results have been successful,accelerated heavy oil and high pour point oil recovery,inhibited edge water fingering and bottom water coning,and improved single well production and oilfield recovery factor.