我国第一个深层砂岩油田—马西油田已经建成,投产两年来一直稳产高产,开发效果良好。油田位于北大港断裂构造带东部倾没端。在地震普查该构造带时发现构造显示,后又用数字地震1×1公里测网详查,证实是一个较完整的穹隆背斜。长4.5公里,宽3公里。南翼倾角3至5度,北翼倾角6至8度。最大闭合高度为130米。 马西油田早在10多年前就已开发,当时全部油井均在浅层采油。1978年第一口4000米深探井(港深13井)在下第三系渐新统沙河街组一段发现油层。通过测试,11毫米油咀日喷原油212吨,气12万余立方米,且不含水。从而打开了深层勘探的新局面。之后,又钻5口详探井,控制了含油面积,并证实是一个层状构造油藏。上油组的油水界面为—3900米,下油组油水界面为—3970米。—3970至—4002米为油水过渡带。在此认识的基础上布置生产井网,于1981年建成投产。投产初期单井日产平 China’s first deep sandstone oilfield - Masi Oilfield has been completed and put into production two years has been stable and high yield, good development. The oil field is located in the eastern tip of Beidagang fracture structure. Tectonic belt in the earthquake census found that the tectonic display, and then use the digital seismic 1 × 1 km network survey, proved to be a more complete dome anticline. 4.5 km long and 3 km wide. South wing dip 3 to 5 degrees, North wing dip 6 to 8 degrees. The maximum closing height is 130 meters. Massey oilfield was developed as early as 10 years ago, when all the wells were in shallow oil production. In 1978 the first 4000 meters deep exploration well (Hong Kong and Shenzhen deep well 13) in the Lower Tertiary Oligocene Shahejie formation found in the first paragraph. Through the test, 11 mm oil Tsui daily spray 212 tons of crude oil, gas 12 million cubic meters, and does not contain water. Thus opening up a new prospect of deep exploration. Later, another 5 well exploration wells were drilled to control the oil-bearing area and proved to be a layered structural reservoir. The oil-water interface of the oiling group is -3900 meters and the oil-water interface of the lower oil group is -3970 meters. -3970 to -4002 meters for the oil-water transition zone. On the basis of this understanding, the well layout of production wells was completed and put into operation in 1981. Single-well production Nissan flat