The South Dakota Affidavit of Cessation of Production and Plugging of Well Specifying Date of Last Royalty Payment is a legal document that is used in the oil and gas industry. This affidavit is typically filed when a well has reached the end of its productive life and is no longer producing any oil or gas. Key details that need to be included in this affidavit are the specific well identification information, such as the well name, number, and location. It is crucial to mention the exact date of the last royalty payment made for the well, which signifies the time when production ceased. This information is necessary for the proper closure of the well and to halt any further obligations related to royalty payments. There are different types of South Dakota Affidavits of Cessation of Production and Plugging of Well Specifying Date of Last Royalty Payment based on the type of well and its specific circumstances. Some common variations include: 1. Vertical Well Affidavit: This affidavit is used when a vertical well, which is drilled straight down into the ground, is no longer producing oil or gas, and the operator intends to plug and abandon the well. 2. Horizontal Well Affidavit: This type is specific to horizontal wells, which are drilled horizontally through the rock formations to increase the reservoir exposure and maximize oil or gas extraction. These affidavits are filed when horizontal wells have reached the end of their productive life and require plugging. 3. Decayed Well Affidavit: This affidavit is applicable when a well's integrity has significantly deteriorated, making it unsafe or economically unviable to continue operations. The affidavit specifies the date when the last royalty payment was made and states the operator's intention to plug and abandon the well due to its decayed condition. It is important to note that the specific requirements for the South Dakota Affidavit of Cessation of Production and Plugging of Well Specifying Date of Last Royalty Payment may vary based on state regulations, the operator's interests, and the circumstances of the well's cessation. Therefore, it is always advisable to consult with legal professionals or relevant state authorities to ensure compliance with the applicable laws and regulations.