The researches on the genetic types of reservoir spaces of igneous rocks in the Luo 151 block, Jiyang sag, include: systematic core analyses of diabase intrus ive bodies, analyses of scanning electrical microscope and inclusions， and geop h ysical methods. The genetic types of reservoir spaces in igneous rocks can be divided i nto the primary pores and secondary pores, such as vesicles, condensatio n fissures, intercrystal micropores, structural joints and dissolved pores. Due to the different geneses and features of the reservoir space types, their contri butions to oi l and gas accumulation and connection in the reservoirs are very different. In the diabase intrusive body of the Luo 151 block, condensation fissures a re ve ry important reservoir spaces in the igneous rock oil\|gas pools, which are also c onnectors of other genetic reservoir spaces. The secondary reconstruction of res e rvoir spaces in various pores during the burial process are also important to ig neous rock reservoirs. Primary pores are destroyed by fillings of chlor ite, silicon and gypsum, while the corrosion of feldspar and pyroxene helps expansion of the primary pores.Therefore a good understanding of the genetic types of igneous rock reservoirs is essential to ex ploration and development of oil and gas in igneous rocks of various types.