Highlights20 shale wells expected by the end of the next yearCompany expects to ease fracking concerns of incoming presidentAcapulco, Mexico — Mexico's Pemex expects to explore and assess its shale oil and gas portfolio with the hope of starting mass development in 2023-2024, the company's exploration director said Friday.Receive daily email alerts, subscriber notes & personalize your experience. Register Now The company is currently drilling its first two shale exploration wells since the energy reform was approved, Juan Antonio Escalera told S&P Global Platts at the sideline of the Mexican Petroleum . . .