Characteristic Of Lun Gu Xi Ordovician Carbonate Rock Karst Oil Reservoir And Developing Technology

The carbonate oil reservoir of tarim oil field exploration is in recent years in exploration areas of significant breakthrough. After years of exploration and rolling development,09 Lun Nan ancient buried hill regions rings viscosity-temperature has reached 35 ten thousand tons, but the west of Lun Nan ancient buried hill (Abbrviation:Lun Gu Xi) regions dramatize the crude oil output accounted for a round of ancient oilfield production 55%. So Lun Gu Xu regions ordovician carbonate karst reservoir tectonic background, stratigraphic characteristics, karstic types, oil reservoir relations, reservoir characteristic and developing technology research is very meaningful. This thesis is according to the recent Lun Gu Xu regions ordovician carbonate oilfield exploration and development situation, summarizes Lun Gu Xu regions ordovician carbonate reservoir characteristic of geology, oil and relevant mining technology. Got the following results:1. Lun Gu Xu regions ordovician carbonate ancient water-eroded cave system growth with larger scale, but different ancient karst landform units, each with the distribution features of the obvious difference.2. Lun Gu Xu regions ordovician carbonate karst cave system with the vertical stratification, Lun Gu Xu region characteristic of ordovician carbonate buried karst hang up the divided into four zones:surface karst zones, Vertical infiltration (dissolution) belt; Runoff dissolution belt; Undercurrents dissolution belt. Different ancient karst landform units, each with the distribution features of the obvious difference.3. The different types of geomorphic units, its primary productivity has obvious differences:karst sloping-peak plexus ridges ridge gully primary productivity is stronger, the second karst valley, QiuFeng sloping-again times for karst platform-dissolve Cupid lowlands.4. High efficiency, high yield Wells is mainly distributed in the ancient karst slope belt of local high department highs, residual Cupid high department.5. The fixed capacity feature is apparent, well open production production decline fast, hydraulic, sets of pressing to drop quickly, until the elastic energy without production date, exhausted after turn extraction liquid surface continued to decline, insufficient for liquid.6. The wild water flooding is given priority to, the pressure inside the cave landing is small, can be considered such as potential body, as source to attend only for fluid.7. Lun Gu Xu regions viscous oil belong to exceed deep super thick carbonate reservoir, oil well production characteristic feature is the initial high output, but declining quickly, difficult exploitation in domestic rare, most Wells for energy shortage and shut-in, restore energy for a long time, oil well production time rate is low, influence of oil production speed and recovery Wells, restricted the wheel ancient west carbonate oilfield efficient development.8. The various developing technology application effect of this well depends on the precise understanding in geological, have already formed a set of procedures of single well mining scheme.