Study On Soil And Water Environment Influence Of Xingzichuan From Petroleum Extraction And The Treatment

According to the Xingzichuan extraction project composition, the scale and the characteristic as well as the local natural environment, the social economy condition, the paper studied the extraction project through the diagnosis to water and soil environment influence, had forecast the petroleum extraction to the apricot Sichuan water and soil environment's destruction, occupies and so on disturbing influence area and the addition soil erosion quantity, has been clear about the prevention responsibility scope, has carried on the conservation of water and soil government district, has planned the conservation of water and soil government measure, has carried on the model government measure design, has established the conservation of water and soil project investment budgetary estimate, and proposed the government safeguard mechanism. The findings indicated:(1) Xingzichuan extraction project well yard selected location is reasonable, maximum limit achieved has as far as possible little taken the farmland, the forest land, the export-road, the oil line route selection is reasonable, the construction length short perturbation destroyed the surface area to be small, maximum limit reduced the engineering construction to create digs damages and occupies the surface vegetation area, has protected the locality frail ecological environment effectively, satisfied "Development Items of basic construction Conservation of water and soil Technology standard" restrictive regulations; The well yard uses the reservoir collection rain water union actual situation, has prevented the well yard soil erosion effectively, meets the conservation of water and soil requirement.(2) The extraction project occupies the land and digs fills in the perturbation to have the major impact on the water and soil environment. The engineering construction disturbs the original landform, to occupy land area 152.22hm~2, damage conservation of water and soil facility area 152.22hm~2; Construction period use cubic meter of earth and stone total quantity 2,127,400 m~3, in the well yard construction produces the abandoned side disorder stack, is increases the soil erosion the important source, the soil erosion by the water erosion primarily, project construction soil erosion total quantity 181195t, corroded increase 58429t.(3) Xingzichuan extraction area soil erosion prevention responsibility scope total 281.02hm~2, engineering construction area 152.22hm~2, immediate influence area 128.80hm~2. The soil erosion prevention measure according to the well yard area, the crude oil export-road, the crude oil transportation pipeline area and so on three areas plans the design separately. The plan addition prevention measure including the well yard earth or stone excavated area above the catch drain and the bush forest belt, fills area Qiao to fill the mixed forest construction; Crude oil transportation pipeline area land improvement and vegetation afforestation; The crude oil transportation path roadbed excavated surface both sides suppose the drain and the side slope protective forest project. The prevention measure main resilience lays bricks catch drain 3200m for the thick liquid, the thick liquid lays bricks drain 27500m, plant measure area76.41hm~2: Afforests 39.59hm~2, plants grass area 36.82hm~2. The conservation of water and soil government total investment needs 8,802,300 Yuan.(4) conservation of water and soil treatment implementation, may the control engineering construction produce effectively the artificial soil erosion, has good guarantees the water, to guarantee the earth benefit. And the perturbation land government rate achieves 99.7%, the soil erosion government achieves 98.5%, the vegetation restores the coefficient to achieve 99.8%, the Lin Cao vegetation coverage fraction achieves 50.7%, blocks the dregs rate to be possible to achieve 98.5%, the soil erosion modulus may reduce to 1420t/kma (deducts well yard soil consolidation part), the soil erosion control ratio is 0.7. At the appointed time project area ecological environment may have the effective improvement, and may receive certain economic efficiency and the social efficiency.