Liaohe Oil Region Du 84 Horizontal Well Use Degree Research

This research in the analysis actual production data, the note steam data, the pressure, steam section plane, oil well logging, temperature profile foundations, the utilization mathematics statistics, the numerical simulation and the oil deposit engineering technology and the method, obtain from the sub-area oil deposit geological feature and the horizontal well cyclic steam injection development effect, the deep research has affected the ultra thick oil horizontal well use degree each kind of factor. Has obtained below the main research results:(1) The Du 84 Xinglongtai oil level growth is good, in plane big area continually piece distribution. Oil layer buried 650～850m. The horizontal well goal level is XingⅥand XingⅠ, XingⅥ'thickness is 33.7m equally, XingⅠ's thickness is 14.2m equally. 20℃when the ground dead oil density is bigger than 1.0g/cm3 generally; 50℃when the ground dead oil viscosity is bigger than generally 5.0×104mPa.s, highest may reach 40×104mPa.s, and along with the burial depth shoal, the crude oil viscosity increases; the crude oil contains the wax quantity generally in 2～4%, solidification point in 20～40℃, sol+asphaltene content above 50%.(2) In the horizontal well cyclic steam injection cycle date productive decreasing progressively conforms to the index decreasing progressively rule; Cycle productive, cyclical oil vapor compared to after two cycles conforms to the index decreasing progressively rule, cyclical mean diurnal productive decreasing progressively conforms to the index decreasing progressively rule.(3) In different period's horizontal well, the use degree is different. Between the vertical shaft encrypts the region deployment horizontal well, after first round had finished, in the horizontal section the effective use's length accounts for the total length proportion is 40%, after two cycles, achieves 80%. Has not used the horizontal well which in the region deployed, after the first round turnover had ended, in the horizontal section the effective use's length accounts for the total length 55%, second round achieves 73%, third round achieves 80%. Increases along with the cycle, the use degree presents increases the tendency.(4)The influence horizontal well use degree's primary factor has the reservoir heterogeneity, the horizontal segment size rationality, the remaining oil distribution condition, the target area temperature pressure degree of saturation three change situations, the steam in the horizontal well chamber's fluid state and so on.(5) Strengthens the horizontal performance monitor is enhances the horizontal well use degree the premise, the horizontal well monitor technology mainly includes the temperature monitoring, the pressure monitor, the degree of saturation monitor and so on.(6)Enhances the horizontal section use degree the more effective technical countermeasure mainly to have double barrel methods at present and so on note steam, multi-spot note steam, combined turnover, multi-dimensional chemistry turnover.