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Through analysis of four aspects, including the distribution and production of global oil and gas fields, the distribution and changes of remaining recoverable reserves, the differences in oil and gas production between regions/countries, and the development potential of oil and gas fields with production capacity not built and to be built, this paper presents the situation and trends of global oil and gas development in 2022. It is found that, in 2022, oil and gas fields are widely distributed worldwide, and upstream production activities continue to recover; the oil and gas reserves decrease slightly year on year, and the oil and gas reserves in sea areas increase significantly; the oil and gas production increases continuously, and the key resource countries make a significant contribution in oil and gas production growth; the oil and gas fields with production capacity not built and to be built hold abundant reserves, and their development potential will be gradually released with the economic benefits increase. Further analysis is conducted from the perspectives of global oil and gas resources continuity, geopolitical risks, potential of international cooperation, and upgrade of unconventional oil and gas technology. Finally, in view of core business domains and strategies under the new situation, the Chinese oil companies are recommended to: (1) keep a foothold in onshore conventional oil and gas development by virtue of their comparative advantages and learning from other's experience in cooperation; (2) carry out pilot tests on development adjustment, and deepen the international cooperation in enhanced oil/gas recovery; (3) improve the oil and gas operation capabilities in sea areas to transform from follower as minority shareholder to joint venture and then to independent operations; and (4) seek appropriate ways for shale oil/gas development to reduce the dependence on foreign oil and gas.

Objective: To evaluate the efficacy and practicability between bronchial sleeve resection or reconstruction of the pulmonary artery by video-assisted thoracic small incision and routine posterolateral incision for lung cancer., Methods: The clinic data was analyzed retrospectively, including 139 cases in our hospital underwent sleeve lobectomy and bronchoplasty by video-assisted thoracic small incision surgery for lung cancer from January 1995 to July 2007 and 99 cases in the HUAXI Hospital of SICHUAN University underwent routine posterolateral incision from April 2000 to December 2005. All patients whose bronchus and/or pulmonary artery were involved underwent the operation and experienced the bronchial sleeve resection or reconstruction of the pulmonary artery., Results: All patients were done operation successfully with no perioperative mortality and no occurrence of anastomosis stenosis as well as fistula. The median survival period of video-assisted thoracic small incision patients and the posterolateral incision patients were 63.17 months and 42.00 months, respectively (P > 0.05). There was no sign of reperfusion injury in the reconstruction of the pulmonary artery patients. The small incisions' length was from 8 to 13 cm and the mean length was 10 cm. The routine posterolateral incisions' mean length was 30 cm. Compared to the patients underwent the routine posterolateral incision, patients underwent the operation of video assisted thoracic small incision had less operation time, less chest tube time, less hospitalization time and less postoperative shoulder joint dysfunction., Conclusions: The bronchial sleeve resection and reconstruction of the pulmonary artery by video-assisted thoracic small incision surgery for lung cancer can finish the same work as the traditional thoracic lateral incision with less trauma and recovery time.