Abstract: During the 14^th Five–Year Plan period, in the face of the complex situation where exploration targets gradually shifted towards “low grade, unconventional, difficult-to-utilize, and deeply buried” resources, as well as multiple challenges in fundamental theoretical understanding and supporting technologies, PetroChina Daqing Oilfield Company (Daqing Oilfield) has adhered to the overall layout of “focusing on Northeastern China, accelerating development in Western China, balancing conventional and unconventional resources, advancing both oil and gas, and exploring both shallow and deep targets”. By deepening fundamental research, advancing cutting-edge theoretical innovation, and accelerating technological iteration and upgrading, multiple strategic breakthroughs and large-scale reserve increase across various fields have been achieved, strongly supporting the robust rise of the oilfield’s “second curve”. Through continuous research efforts, the Company has made groundbreaking progress in several key fields: (1) It has developed a whole oil and gas system theory, innovatively developed a dual sweet spot evaluation technique, and first proposed the in-situ accumulation theory of Gulong shale oil, driving the large-scale reserve increase and profitable production of conventional oil, tight oil, and shale oil in the northern Songliao Basin; (2) It has deepened the understanding of hydrocarbon enrichment law in multi stage superimposed basin, and innovatively established models of uplift zone controlling reservoir
development and hydrocarbon accumulation, proving a 300-billion-cubic-meter giant gas field in Maokou Formation in Sichuan–Chongqing exploration area; (3) It has reshaped the migration and evolution laws of foreland lake basin, making a historic breakthrough in shale oil production in Sichuan–Chongqing exploration area; (4) It has refined the theory of hydrocarbon accumulation in complex faulted basin, and established unconventional hydrocarbon accumulation mode, achieving significant breakthroughs in the exploration of intra-source tight oil in Hailar Basin; (5) It has constructed the hydrocarbon accumulation model in platform marginal reef beach fault–karst complex, and broken through extreme geological conditions such as “ultra-depth, ultra-high pressure, and ultra-high temperature”, preliminarily forming a 100-billion-cubic-meter reserve zone in Yuman platform marginal zone in Tadong exploration area. Looking ahead, in response to severe challenges such as significantly reduced mining rights areas, increasingly complex exploration targets, and heightened difficulties in profitable exploration, the Company will seize the opportunities of strategic transformation, and forge a new path towards the high-quality development characterized by resource replacement, technological leadership, and green intelligence. It will scientifically plan its exploration orientations
and key tasks, and comprehensively promote five major projects, including large-scale reserve increase in Songliao Basin, stereoscopic reserve increase in Sichuan–Chongqing exploration area, rapid reserve increase in Tadong exploration area, reserve replacement and increase in Hailar Basin, and reserve succession and increase in new exploration areas and fields, taking on the responsibility of building a world-class modern century-old oilfield, and continuously contributing Daqing’s strength to ensuring national energy security.

Key words: Daqing Oilfield, the 14^th Five–Year Plan, exploration situation, major breakthrough, development strategy