Huangshatuo Volcanic Reservoir Geology And Development Design Study

Huangshatuo Oilfield discovered in 1999. It is located about 3km north-east of Taian Huangshatuo Town of Liaoning Province. Its structure location lies in the western area of Middle Tiejianglu structure of the eastern depression in the Liaohe basin,and its southern part borders on the Oulituozi Oilfield.,the entire block has been at home by the Housing besiege the sag. The main producing horizon is Shasanxia section of Shahejie. Construction sector as a whole form the West as being the fault Huangshatuo fault 2 faults are gripping the nose structure,the main oil-bearing layer of sand line from Shahejie 3 Lower volcanic trachyte,Segment with deep wells, ranging between 2800-3300m.Oil-bearing area 9.3km2,proven geological oil reserves of 2171×104t.The well section 2800～3300.Such reserves were second only to Xinjiang's western Carboniferous rock (6318×104t) with an area of Carboniferous (2984×104t),a domestic third-largest volcanic reservoir. Middle layer of the reservoir trachyte,trachyte so far as the oil and gas reservoirs are very rare at home and abroad.Huangshatuo this issue based on the geological field, development of information,through the reservoir geological characteristics,development projects and the development of effective evaluation,the reservoir provides a basis for efficient development,not only played an important role,but also the development of the same type of volcanic reservoir has accumulated rich experience,a high for reference. The main study conclusions were as follows:①Huangshatuo a deeply buried reservoir (3000m),a high degree of large reservoir (300m),crude nature of the good (0.4mPa?s), ,the original abundance of energy (elastic energy, dissolved gas can,bottom water energy), porosity and permeability in good condition ( effective porosity 11.0%, in the same type of oil fields is higher; analysis of permeability(0.994×10-3μm2),but effective permeability higher 20-45×10-3μm2) characteristics.②Huangshatuo oilfield production wells with higher productivity differences in general, relatively high-yielding wells contiguous, 300m spacing and weak interference between wells show relatively homogeneous reservoir dynamic characteristics, and has UnRegister bottom water coning quick adjustment layer again soon flooded high angle fracture characteristics of the massive reservoir.③Huangshatuo suitable for oil field water injection has the following advantages: strong hydrophilic reservoir rocks; extremely low viscosity of crude oil (0.4mPa?s); transverse crack to a small network of twists and turns the main seam; crack extension is not long, 300m spacing weak interference between wells; has three wells Test Note 5 months, on 200-400m3 and the surrounding water wells did not show sign of water channeling.④General terms of Huangshatuo oilfield injection is superior to the domestic effects of a good North andesite reservoir within Menge, Liaohe Qijia mix of granite buried hill reservoir, and a district of Xinjiang Carboniferous basalt reservoir is expected that the water recovery up to 18% -- about 20%.⑤Huangshatuo oilfield injection should be conducted, its strength and taken out of injection speed should be controlled, using a moderate depth of water fuel pumping means to obtain the 18% -20% of the recovery. Reservoir water injection into the development, and achieved obvious results.