Quantitative Evaluation On Dominate Channel Of Qinhuangdao32-6Oil Field

Qinhuangdao32-6oil field is a typical heavy oil field and it is large and complex.The geological reserve is1.7×108m3and the annual production is218m3/d. There are165producing wells. The oil field has a very good development prospect.However, the oil field has the significant characteristics such as loose sand, heavyoil viscosity, and heavy aeolotropism. Otherwise, the water content has been as high as86%. With the injection water missing in dominates channel, it is hard to improve therecovery. To solve the problems above, the Qinhuangdao32-6oil field dominatechannel has been taken as research object, through fuzzy comprehensive evaluationmethod to determine dominate channel of oil and water wells. Then the dominatechannel parameters are calculated such as volume, permeability, sealing edge channel toprovide data support. The countermeasures have been taken to solve the prominentcontradictions in the development, to control the oil and water production balance, andto enhance the water displacement recovery.Through the study of Qinhuangdao32-6oil field dominate channel, the followingconclusions could be gotten:●Through fuzzy comprehensive evaluation method, the dominate channel of oiland water wells have been determined. The wells with dominate channel are separatedwith the normal wells to select the destinations for plugging.●Through dynamic data, empirical formulas and probability density method, thedominate channel parameters are calculated. With the change of dominate channel, thedominate channel parameters change in different degrees.●For the12water wells in North and South of Qinhuangdao32-6oil field, theamount of blocking agent is calculated, and the polymer gel is adopted. Thecountermeasures have been taken to plug the dominate channel of water wells andproducing wells.