超稠油高温调剖封窜技术

蒸汽吞吐开采是辽河油田超稠油主要开采方式.曙光油田杜84块兴隆台超稠油油藏孔隙度一般为25％～30％,空气渗透率一般高于1306×10-3 μm2,具有高孔隙度,高渗透率的特点,极易发生汽窜,导致注入蒸汽热能不能充分利用,直接降低了注汽井生产效果,使油藏动用不均的矛盾加剧.邻井受窜后含水升高液量突升,温度升高,影响其生产效果或关井防喷.汽窜加剧油层套管变形或损坏.研制的耐高温堵剂有效封堵高渗透层,调整地层高低渗透层带间的吸汽差异,改变注入蒸汽的走向,达到缓解汽窜、消除井间干扰、扩大注入蒸汽波及体积、提高周期采油量的目的.

High Temperature Profile Control and Channel Blocking Sealing Technology for Super Heavy Oil Researviors

The cyclic steam stimulation is a recovery method of super heavy oil in Liaohe oilfield.The porosity of Du84 block of Xinglongtai oilfield in super heavy oil reservoir is generally 25% to 30%,air permeability is generally higher than 1306 × 10-3 μm2.Because of its high porosity and high permeability,steam channeling easily occurs to cause that heat energy of the injected steam can not be fully utilized,which can reduce production effect of the steam injection well.Water cut in adjacent well after the steam channeling increases,temperature rises,which can affect the production or cause to shut in well.Steam channeling aggravates casing deformation or damage.The high temperature resistant plugging agent can effectively block high permeability layer,adjust the steam absorption difference between low permeability layer and high permeability layer,change the flow direction of injected steam,which can alleviate the steam channeling,eliminate interference among wells,expand the injected steam swept volume,improve cycle oil production.