For Sinopec the investment marks a significant expansion of its presence in Egypt, where it already operates a JV with Egypt's Tharwa Petroleum. The Apache deal is also the biggest Chinese investment in the Middle East region to date. It also looks likely to be part of a wider expansion of Chinese interest in the area, after Iraqi government officials said last week that PetroChina ( PTR) was in talks to acquire 25% of Exxon Mobil's ( XOM) West Qurna-1 oilfield in Southern Iraq. Chinese oil companies have often shown a higher tolerance for political risk than western counterparts, which have preferred to take on the technological risk involved in drilling for deepwater oil. Sinopec is not, however, alone in gambling on Egypt. On Wednesday, France's Total ( TOT) said it had acquired Chevron's ( CVX) Egyptian service station network for an undisclosed price. Apache's Egyptian assets are located in Egypt's unpopulated Western Desert and have not been affected by the violent social unrest that has swept the country following a military coup that toppled former President Mohammed Morsi in July. Egypt is a relatively small producer of oil and gas but its political problems have contributed to rising oil prices. The country has a key role in the oil supply chain as the guardian of key transport links, including the Suez Canal and the Sumed pipeline, which transports oil from the Gulf of Suez to the Mediterranean Sea. The Apache deal could provide a boost for other oil and gas companies that have significant operations in Egypt and the surrounding region. "It may alleviate a little of the market skepticism that there is no one willing to invest in the volatile region," noted Morgan Stanley analysts. They highlighted California's Occidental Petroleum ( OXY), which produces about 37% of its total output in the Middle East and North Africa, and which is thought to be looking to sell all or part of those assets. Other oil companies with particular exposure to Egypt include Italy's Eni SpA ( E) and the U.K.'s BG Group . Barclays analysts estimate that Eni counts on the country for about 14% of its total oil production, and BG draws about 20% of its total output from Egypt.