CAJ | 학술논문

兴北3断块垛一段油藏为稠油油藏，2012年至今部署5口水平井。该区块原油黏度6000~30000 mPa·s，属于高黏度原油，油质突出的特点是沥青质、胶质含量较高，导致开采难度大。前期生产过程中，兴北区块内五口水平井均采取了空心杆电缆加热举升工艺和电热带伴热地面集输工艺，生产过程中抽油机载荷大、电耗较高，五口井电热杆加热年耗电需360万度，采油成本大幅度提高。针对抽油机载荷大、举升难度大、能耗高的问题，结合油田长期滚动开发的生产实际，决定改变思路，选择化学降黏作为突破口。通过对化学药剂反相分散减阻剂降黏方案多次室内及现场试验，达到了降低能耗的目的，有效地解决了稠油油藏举升难度大的问题。
흥북3단괴타일단유장위주유유장，2012년지금부서5구수평정。해구괴원유점도6000~30000 mPa·s，속우고점도원유，유질돌출적특점시력청질、효질함량교고，도치개채난도대。전기생산과정중，흥북구괴내오구수평정균채취료공심간전람가열거승공예화전열대반열지면집수공예，생산과정중추유궤재하대、전모교고，오구정전열간가열년모전수360만도，채유성본대폭도제고。침대추유궤재하대、거승난도대、능모고적문제，결합유전장기곤동개발적생산실제，결정개변사로，선택화학강점작위돌파구。통과대화학약제반상분산감조제강점방안다차실내급현장시험，체도료강저능모적목적，유효지해결료주유유장거승난도대적문제。
Duo-1 member of Xingbei-3 block is a heavy oil reservoir. From 2012, five horizontal wells were disposed. Crude viscos-ity of this block within 6 000~30 000 mPa·s belongs to high viscosity. The prominent features are high asphaltene and colloid con-tents, which lead to great recovery difficulties. During the early production process, these five horizontal wells all applied hollow rod pipe heating lift technology and surface gathering process with electrothermal belt accompanying heat. The pumping load is large and the power consumption is high in the production process. These five wells consume 3.6 million kW·h per year, so that the recovery costs increase substantially. Aiming at the problems above and combined with the actual production of the oil field’s long-term rolling development, chemical viscosity break is selected. By several indoor and field tests, the power consumption is reduced and the lift difficulties of heavy oil reservoir are solved.