This chapter provides an overview of the Sulige Gas Field, covering its geographical location, hydrometeorology, regional geology, reservoir environment, hydrogeology, and the current status of gas field development. The aim is to enable readers to gain a comprehensive understanding of the Sulige Gas Field and to establish a fundamental background for subsequent chapters. The Ordos Basin, located in the eastern part of Northwest China, is the country’s second-largest sedimentary basin and also the second-largest basin rich in oil and gas resources. Abundant natural gas, petroleum, coal, and various other mineral resources are hosted within the basin. The basin covers an area of approximately 370,000 km2